10099-58-8

Basic information

• Product Name: Lanthanum(III) chloride
• Synonyms: Lanthanum chloride anhydrous≥ 99.99% (Assay);LANTHANUM(+3)CHLORIDE;LANTHANUM, AA STANDARD;LANTHANUM CHLORIDE;LANTHANUM (III) CHLORIDE;LaCl3;Lanthanum chloride (LaCl3);Lanthanum chloride anhydrous
• CAS NO: 10099-58-8
• Molecular Formula: Cl₃La
• Molecular Weight: 245.26
• EINECS: 233-237-5
• Product Categories: Other Metal;Inorganics;Catalysis and Inorganic Chemistry;Chemical Synthesis;Crystal Grade Inorganics;Lanthanum Salts;LanthanumMetal and Ceramic Science;Salts;metal halide
• Mol File: 10099-58-8.mol
• Article Data: 76

Chemical Properties

• Melting Point: 860 °C(lit.)
• Boiling Point: 1812 °C(lit.)
• Flash Point: 1000°C
• Appearance: White to almost white/beads
• Density: 3.84 g/mL at 25 °C(lit.)
• Storage Temp.: Inert atmosphere,Room Temperature
• Water Solubility: Soluble in water.
• Sensitive: Hygroscopic
• Stability: Stability
• Merck: 14,5363
• CAS DataBase Reference: Lanthanum(III) chloride(CAS DataBase Reference)
• NIST Chemistry Reference: Lanthanum(III) chloride(10099-58-8)
• EPA Substance Registry System: Lanthanum(III) chloride(10099-58-8)

Safety Data

• Hazard Codes: Xi,N
• Statements: 36/37/38-11-51/53-43-41
• Safety Statements: 26-36-61-36/37/39
• RIDADR: UN3264
• WGK Germany: 2
• RTECS: OE4375000
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 10099-58-8(Hazardous Substances Data)

Usage

Physical Properties

The anhydrous chloride is a white hexagonal crystal; hygroscopic; density 3.84 g/cm3; melts at 850°C; soluble in water. The heptahydrate is a white triclinic crystal; decomposes at 91°C; soluble in water and ethanol.

Uses

Different sources of media describe the Uses of 10099-58-8 differently. You can refer to the following data:
1. Lanthanum(III) chloride is used to prepare other lanthanum salts. The anhydrous chloride is employed to produce lanthanum metal.
2. Lanthanum chloride is used to prepare other lanthanum salts. The anhydrous chloride is employed to produce lanthanum metal.
3. Lanthanum chloride is a precursor for synthesis of lanthanum phosphate nano rods and used in gamma detectors. It is also used as a catalyst for high pressure oxidative chlorination of methane to chloromethane with hydrochloric acid and oxygen. In organic synthesis, lanthanum trichloride acts as lewis acid for the conversion of aldehydes to acetals.

Preparation

Different sources of media describe the Preparation of 10099-58-8 differently. You can refer to the following data:
1. Lanthanum(III) chloride is formed by dissolving the oxide, hydroxide or carbonate in hydrochloric acid, followed by crystallization. The anhydrous chloride is obtained by heating oxide, hydroxide, or carbonate in an atmosphere of dry hydrogen chloride. La2(CO3)3 + 6HCl → 2LnCl3 + 3CO2 + 3H2O Another method involves heating lanthanum oxide with excess ammonium chloride at 300°C.
2. The heptahydrate is formed by dissolving the oxide, hydroxide or carbonate in hydrochloric acid, followed by crystallization. The anhydrous chloride is obtained by heating oxide, hydroxide, or carbonate in an atmosphere of dry hydrogen chloride. La2(CO3)3 + 6HCl → 2LnCl3 + 3CO2 + 3H2O Another method involves heating lanthanum oxide with excess ammonium chloride at 300°C.

Reactions

When heated in the presence of water vapor, lanthanum oxochloride is formed: LaCl3 + H2O→LaOCl + 2HCl Heating with glass at elevated temperatures also forms oxochloride: LaCl3 + SiO2→2LaOCl + SiCl4 Lanthanum chloride reacts with hydrogen sulfide when heated at 1100°C, forming lanthanum sulfide: 2LaCl3 + 3H2S→La2S3 + 3H2S Reactions with ammonia and phosphine at elevated temperatures yield lanthanum nitride and phosphide, respectively: LaCl3 + PH3→LaP + 3HCl Lanthanum chloride is reduced to lanthanum metal when heated with an alkali or alkaline earth metal at temperatures above 1000°C: LaCl3 + 3Li→La + 3LiCl

Chemical Properties

Lanthanum(III) chloride is white powder or colourless crystals

General Description

Lanthanum(III) chloride is white crystalline solid. Gives an amber aqueous solution that can cause destruction or irreversible alterations in human skin tissue at the site of contact. Has a severe corrosion rate on steel.

Air & Water Reactions

Deliquescent. Water soluble.

Reactivity Profile

Aqueous solutions of LANTHANUM CHLORIDE contain moderate concentrations of hydrogen ions and react as acids to neutralize bases. Does not usually react as either oxidizing agents or reducing agents but such behavior is not impossible. May catalyze organic reactions.

Health Hazard

TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Fire Hazard

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.

InChI:InChI=1/ClH.La.7H2O/h1H;;7*1H2/q;+3;;;;;;;/p-1

Synthetic route

lanthanum tert-butoxycuprate → lanthanum(III) chloride + copper(l) chloride

Conditions	Yield
With HCl In tetrahydrofuran gaseous HCl was condensed into soln. of La complex in THF to result in a formation of finely dispersed ppt.; ppt. of CuCl sepd. by centrifugation, washed with water under Ar, driedin vacuo at 50°; aq. soln. evapd. to dryness to give LaCl3; products identified by elem. anal.;	A 96.8% B 99%

([La(μ-Cl)(H2O)7](Cl)2)2 → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent, solid phase) byproducts: H2O; Schlenk techniques; heating La compd. under vacuum (1E-3 Torr);	99%

hydrogenchloride (7647-01-0) + lanthanum(III) oxide → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In hydrogenchloride metal oxide treated with 1:1 hydrochloric acid; soln. filtered, evapd. to dryness, crystals dried in vaccum dessicator over CaCl2;	85%
In hydrogenchloride soln. evapd., dissolved (distd. water), again evapd. and dissolved (distd. water; pH adjusted to 5;
In hydrogenchloride

lanthanum(III) oxide + erbium(III) oxide + potassium chloride + chlorine (7782-50-5) → erbium(III) chloride (10138-41-7) + lanthanum(III) chloride (10099-58-8)

Conditions	Yield
With pyrographite In gas byproducts: CO; by chlorination-chem. vapor transport react.; mixt. of Er2O3 and La2O3 with carbon and KCl (1:1:6:1 at. ratio) placed in alumina reactor and chlorinated with dry Cl2 (20 cm**3/min) at 800 K for 2 h; gas replace by Ar:Cl2 at 800-1300 K; detn. of separation factor;	A 36.89% B 24.85%

lanthanum(III) oxide + aluminium chloride dimer → aluminum oxochloride + lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent) Al2Cl6 prepd. from Al and Cl2; in Duran tube, at 500°C (Cl2); chemical vapour phase transport with Al2Cl6 from 500 to 400°C, 24 h;	A n/a B 8%
Kinetics; 622-793 K;

lanthanum(III) oxide + ammonium chloride → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
in inert gas at 200-400°C; quant. reaction requires a fourfold excess of NH4Cl;	>99
In neat (no solvent) absence of moisture; large excess NH4Cl, evacuated quartz tube, 500-600 K; sublimation off of excess NH4Cl (vac., 700 K);
In not given byproducts: NH3, H2O; reaction at 650 K; sublimation at 1300 K for 8 h;

hydrogenchloride (7647-01-0) + lanthanum(III) oxide + ammonium chloride → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In hydrogenchloride mixed, decompn.;
In not given purified twice by sublimation in Ta tube;
La2O3 reacted with HCl and NH4Cl; dried under dynamic vac., sublimed;

lanthanum(III) chloride hydrated → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
With NH4Cl In neat (no solvent) heating of LaCl3*99H2O in the presence of NH4Cl (Handbuch der preparativen anorganischen Chemie, Herausg. G. Brauer, Studgardt, 1975);

lanthanum(III) chloride hexahydrate → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In diethyl ether under inert gas, ether - acid drying, finally dried at 190 °C under vacuum;

lanthanum(III) oxide → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
With hydrogenchloride reaction of the oxide with HCl gas at 274-600°C;
With hydrogenchloride In hydrogenchloride La2O3 dissolved in concd. HCl; soln. evapd., residual chloride purified by high-temperature react. with NH4Cl (J.Kutscher and A.Schneider, Z.Anorg.Allg.Chem., 389 (1972) 157);
With ammonium chloride In hydrogenchloride mixture was coprecipitated and subsequently heated at 700 K in vacuum;

lanthanum(III) oxide + thionyl chloride (7719-09-7) → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
at 300°C, 1-2 d, sealed tube;

phosgene (75-44-5) + lanthanum(III) oxide → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent) passing stream of COCl2 over La2O3 at 600 °C;;

lanthanum(III) oxide + aluminium trichloride (7446-70-0) → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent) absence of moisture; large excess AlCl3, evacuated quartz tube, 573 K; fractional sublimation over 450 to 650 K gradient, removal of residual AlCl3 on heating in Cl2/N2 stream;

tetrachloromethane (56-23-5) + lanthanum(III) oxide → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
La2O3 reacts partially to the chloride on heating with CCl4 in a sealed glass ampoule at 400°C and 100 atm.;
In neat (no solvent) passing steam of CCl4 over La2O3 at 330 °C;;
La2O3 reacts partially to the chloride on heating with CCl4 in a sealed glass ampoule at 400°C and 100 atm.;

lanthanum(III) oxide + chlorine (7782-50-5) → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
With pyrographite In solid byproducts: CO; at 800°C for 2 h;
at 650°C, in presence of CO;
With aluminium trichloride; pyrographite In neat (no solvent) chlorinating of rare earth/carbon (molar ration 3/1) mixt. (Cl2 flow rate 20 ml/min, 800 K, 2 h), heating in CO/HCl flow (800-1200 K), chemical vapor transport (AlCl3, 1300 K, 6 h, CO carrier gas, 40 ml/min); atomic emission spectrometric monitoring;
In neat (no solvent) Kinetics; chlorination of La2O3 under Ar/Cl2 was studied at temp. range 260-950°C; TGA, XRD, elem. anal. (EDAX);

lanthanum(III) oxide + chlorine (7782-50-5) → oxygen (80937-33-3) + lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent) Kinetics; equilibrium at 200 - 300°C;;
at 400°C, equilibrium reaction;

lanthanum (7439-91-0) + chromium(III) chloride (10025-73-7) → chromium (7440-47-3) + lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In melt exchange reaction (KCl/NaCl melt, 1073 K);

lanthanumtrichloridehydrate → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
With thionyl chloride In thionyl chloride byproducts: sulfur dioxide, HCl; mixture was refluxed with an excess SOCl2 until SO2 and HCl evolution had stopped, then the remaining SOCl2 was disd. off; LaCl3 was dried in vac.;

hydrogenchloride (7647-01-0) → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In hydrogenchloride sample digesting repeatedly with concd. acid;

lanthanum(III) chloride heptahydrate → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
With hydrogenchloride In neat (no solvent) charged in vessel-shaped crucible, put into silica glass tube in resistance furnace, sintered at 200-230°C for 6-7 h in dried HCl, the furnace cooled;
In neat (no solvent, solid phase) dehydrating at 190°C for 24 h under vac.;
With NH4Cl In melt mixt. of LaCl3*7H2O and NH4Cl (1:8 molar ratio) heated to 120, 200 and 340°C and kept for 3 h at each temp.;

lanthanum hexachloro stannate (IV) * 24 water → lanthanum(III) oxide + lanthanum(III) chloride (10099-58-8) + tin(IV) chloride (7646-78-8)

Conditions	Yield
In neat (no solvent) thermic decomposition;;

lanthanum(III) bis(4-N-(4'antipyrylmethylidene)aminoantipyrine) perchlorate → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent) Kinetics; sample heating in thermal analyser in N2 at 20 K/min up to 800°C; TG, DTG;

LaCl3*5(CH3)3N*3HCl → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
With air In neat (no solvent) byproducts: HCl; thermal decompn. in air, in a Pt-crucible, above 300°C;

lanthanum(III) chloride heptahydrate → water (7732-18-5) + lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent) heating in quartz ampoule under vacuum (5E-3 Torr) to 250°C (1°C/min);

lanthanum(lll) triflate → Carbonyl fluoride (353-50-4) + lanthanum(III) chloride (10099-58-8)

Conditions	Yield
byproducts: SO2; above 400°C;
byproducts: SO2; above 400°C;

lanthanum(lll) triflate → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
thermal decompn. at 500-1000°C;
thermal decompn. at 500-1000°C;
thermal decompn. at 500-1000°C;

La3TaO7 + chlorine (7782-50-5) → 3La(3+)*TaO5(5-)*(OH)(1-)*3Cl(1-)=La3TaO5(OH)Cl3 + lanthanum tantalate + water (7732-18-5) + lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent) heating in sealed ampoule for 10 d, temp.gradient T1: 1000°C, T2: 1100°C;

CsLa(WO4)2 → cesium chloride + tungsten(VI) oxide + lanthanum(III) chloride (10099-58-8)

Conditions	Yield
With HCl In hydrogenchloride byproducts: H2O; decompn. in HCl soln.;

hydrogenchloride (7647-01-0) + LaS(x) x:1.33-1.5; → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
byproducts: H2S, H2;
byproducts: H2S, H2;

lanthanum(1,2-(diimino-4'-antipyrinyl)ethane)2(ClO4) perchlorate → lanthanum(III) chloride (10099-58-8)

Conditions	Yield
In neat (no solvent) Kinetics; N2 atmosphere; heating to 600°C (10 K/min);

gallium (7440-55-3) + lanthanum (7439-91-0) + lanthanum(III) chloride (10099-58-8) → La10Cl4Ga5

Conditions	Yield
In neat (no solvent) stoich. mixt. sealed in Ta tubes under Ar; Ta tubes sealed in silica ampoules (1E-2 mbar); heated (900°C, 20 d);	100%

N-hydroxy-N-phenyl-nicotinamide (37140-94-6) + lanthanum(III) chloride (10099-58-8) → La(3+)*C6H5N(O)C(O)C5H4N(1-)*2Cl(1-)*2H2O={La(C6H5N(O)C(O)C5H4N)}Cl2*2H2O

Conditions	Yield
In ethanol; water byproducts: HCl; mixing hot soln. of hydroxamic acid (aq. alcohol) with metal salt soln. (water) (ratio metal:ligand = 1:1); refluxing on a water-bath, 4-6h; cooling; filtration; drying (desiccator); elem. anal.;	99.7%

boron + lanthanum (7439-91-0) + graphite + lanthanum(III) chloride (10099-58-8) → La3Cl3BC

Conditions	Yield
In neat (no solvent, solid phase) all operations under Ar; stoich. mixt. of compd. and elements sealed in Ta tube, heated at 1050°C for 10 d or at 920°C for 1 d andthen at 1100°C for another 10 d; analyzed by powder XRD;	99%

sodium peroxide + chromium(III) chloride (10025-73-7) + lanthanum(III) chloride (10099-58-8) → lanthanum chromate

Conditions	Yield
In neat (no solvent, solid phase) byproducts: NaCl, O2; 800°C (10 min); washing (H2O), filtering;	99%

benzene 1,3,5-tricarboxylic acid, ammonium salt + lanthanum(III) chloride (10099-58-8) → lanthanum(III) 1,3,5-benzenetricarboxylate hexahydrate

Conditions	Yield
In not given hot soln.;	99%
In not given hot soln.;	99%

lanthanum(III) chloride (10099-58-8) + potassium cyanide copper (I)-cyanide (1:1) + N,N-dimethyl-formamide (68-12-2, 33513-42-7) → (La2(dimethylformamide)8Cu4(CN)10)

Conditions	Yield
In N,N-dimethyl-formamide byproducts: KCl, CuCN; (N2); stirring a mixt. of LaCl3 and KCu(CN)2 in DMF at room temp. for 7 d; filtration, evapn., standing for 1 d; elem. anal.;	99%

(2S,2'S)-N,N'-[pyridine-2,6-diylbis(methan-1-yl-1-ylidene)]bis[2-(methoxymethyl)pyrrolidin-2-amine] + water (7732-18-5) + lanthanum(III) chloride (10099-58-8) → [LaCl3(2S,2'S-N,N,-[pyridine-2,6-diylbis(methan-1-yl-1-ylidene)]bis(2-methoxymethyl)pyrrolidin-1-amine)]*4H2O

Conditions	Yield
In methanol 1:1 mixt. stirred overnight; evapd. (vac.), elem. anal.;	99%

potassium hexafluorosilicate + lanthanum(III) chloride (10099-58-8) + lithium cyanamide (51677-22-6, 51677-74-8) → (potassium)(lanthanum)(tetracyanamidosilicate)

Conditions	Yield
In neat (no solvent, solid phase) byproducts: LiCl, LiF, KF; in glove box, under Ar; LaCl3, K2SiF6 and Li2CN2 mixed in appropriate amounts, mixt. heated in sealed (under vac.) quartz ampoule to 550°C within 5 h, held for 3 d at this temp., coold to room temp., opened inair; washed (H2O), rinsed (acetone), dried at 100°C in air, single crystals selected;	99%
In neat (no solvent, solid phase) byproducts: LiF, LiCl, KCl; (Ar); mixing of LaCl3 in mortar together with K2SiF6 and Li2(CN2); placing in quartz glass ampules; evacuating; sealing; heating in furnace to 550°C (5°C/min); heating at this temp. for 2 ds; cooling toroom temp. by switching off furnace; opening the glass ampules in air; washing with H2O; rinsing with EtOH; drying at 100°C in air;

rubidium hexafluorosilicate + lanthanum(III) chloride (10099-58-8) + lithium cyanamide (51677-22-6, 51677-74-8) → (rubidium)(lanthanum)(tetracyanamidosilicate)

Conditions	Yield
In neat (no solvent, solid phase) byproducts: LiCl, LiF, RbF; in glove box, under Ar; LaCl3, Rb2SiF6 and Li2CN2 mixed in appropriate amounts, mixt. heated in sealed (under vac.) quartz ampoule to 550°C within 5 h, held for 3 d at this temp., coold to room temp., opened in air; washed (H2O), rinsed (acetone), dried at 100°C in air, single crystals selected;	99%
In neat (no solvent, solid phase) byproducts: LiF, LiCl, RbCl; (Ar); mixing of LaCl3 in mortar together with Rb2SiF6 and Li2(CN2); placing in quartz glass ampules; evacuating; sealing; heating in furnace to 550°C (5°C/min); heating at this temp. for 2 ds; cooling to room temp. by switching off furnace; opening the glass ampules in air; washing with H2O; rinsing with EtOH; drying at 100°C in air;

pyridine-2,6-dicarbaldehyde bis-4-bromobenzohydrazone (1192451-80-1) + lanthanum(III) chloride (10099-58-8) → [(pyridine-2,6-dicarbaldehyde bis-4-bromobenzohydrazone)2La]Cl3*7H2O

Conditions	Yield
In methanol elem. anal.;	99%

methanol (67-56-1) + lanthanum(III) chloride (10099-58-8) → {(CH3OH)4LaCl2-μ-Cl}2

Conditions	Yield
In methanol Schlenk techniques; dissolution La compd. in CH3OH, stirring for 10 min or 24 h; slow evapn., isolation of crystals;	99%

(CH2CH2NCH2COOH)2(CH2CH2NCH2CON(C2H5)C9H3O2(CH3)2)(CH2CH2NCH2CCH) (1384118-43-7) + lanthanum(III) chloride (10099-58-8) → La(CH2CH2NCH2COO)2(CH2CH2NCH2CON(C2H5)C9H3O2(CH3)2)(CH2CH2NCH2CCH)(1+) (1384157-49-6)

Conditions	Yield
In methanol cyclen deriv. dissolved in MeOH, then LaCl3 added, heated at 45°Cfor 24 h; concd. to half vol., added to large amt. of Et2O; ppt. collected by centrifugation; solid dissolved in MeOH, pptd. with Et2O; dried under vac. for 24 h;	99%

N-furoylphenylhydroxylamine (7630-14-0) + lanthanum(III) chloride (10099-58-8) → La(3+)*2C6H5N(O)C(O)C4H3O(1-)*Cl(1-)*H2O={La(C6H5N(O)C(O)C4H3O)2}Cl*H2O

Conditions	Yield
In ethanol; water byproducts: HCl; mixing hot soln. of hydroxamic acid (aq. alcohol) with metal salt soln. (water) (ratio metal:ligand = 1:2); refluxing on a water-bath, 4-6h; cooling; filtration; drying (desiccator); elem. anal.;	98.7%

C6H5N(OH)C(O)CH(NH2)C6H5 (141024-80-8) + lanthanum(III) chloride (10099-58-8) → La(3+)*C6H5N(O)C(O)CH(NH2)C6H5(1-)*2Cl(1-)*2H2O={La(C6H5N(O)C(O)CH(NH2)C6H5)}Cl2*2H2O

Conditions	Yield
In ethanol; water byproducts: HCl; mixing hot soln. of hydroxamic acid (aq. alcohol) with metal salt soln. (water) (ratio metal:ligand = 1:1); refluxing on a water-bath, 4-6h; cooling; filtration; drying (desiccator); elem. anal.;	98.1%

Li(1+)*Si(2+)*3Si(CH3)3(1-)*3C4H8O=(C4H8O)3LiSi(Si(CH3)3)3 + lanthanum(III) chloride (10099-58-8) → La(3+)*2Si(2+)*6Si(CH3)3(1-)*Cl(1-)*C4H8O=(C4H8O)La{Si(Si(CH3)3)3}2Cl

Conditions	Yield
In diethyl ether Ar-atmosphere; dropwise addn. of 3 equiv. of Li-compd. to LaCl3 (-78°C), stirring (-78°C, 8 h, then room temp., 84 h); solvent removal, stirring (pentane, 1 h), filtration, concn., crystn. (4°C), washing (pentane), recrystn. (pentane); elem. anal.;	98%

5-aminoisophthalic acid, ammonium salt + lanthanum(III) chloride (10099-58-8) → lanthanum(III) 5-aminoisophthalate tridecahydrate

Conditions	Yield
In water ligand added to aq. soln. of metal salt with stirring; mixt. stirred for1 h at room temp.; filtered; washed (hot water); dried at 30°C for 2 ds;	98%

C6H5N(OH)C(O)CH(NH2)C6H5 (141024-80-8) + lanthanum(III) chloride (10099-58-8) → La(3+)*2C6H5N(O)C(O)CH(NH2)C6H5(1-)*Cl(1-)*H2O={La(C6H5N(O)C(O)CH(NH2)C6H5)2}Cl*H2O

Conditions	Yield
In ethanol; water byproducts: HCl; mixing hot soln. of hydroxamic acid (aq. alcohol) with metal salt soln. (water) (ratio metal:ligand = 1:2); refluxing on a water-bath, 4-6h; cooling; filtration; drying (desiccator); elem. anal.;	97.1%

lanthanum(III) chloride (10099-58-8) + copper (I) tert-butoxide (35342-67-7, 35342-68-8) → lanthanum tert-butoxycuprate + copper(l) chloride

Conditions	Yield
In tetrahydrofuran byproducts: LiCl; all operations in sealed evacuated tubes with thoroughly dried and degassed solvents; mixt. of t-BuOCu and LaCl3 in THF was stirred at 60°C for 20 h; ppt. of CuCl sepd. by centrifugation; soln. evapd.; identified by elem.anal., NMR and IR spectra;	A 96.9% B 89.1%

lanthanum(III) chloride (10099-58-8) + N-hydroxy-N-phenylisonicotinamide (143997-57-3) → La(3+)*C6H5N(O)C(O)C5H4N(1-)*2Cl(1-)*2H2O={La(C6H5N(O)C(O)C5H4N)}Cl2*2H2O

Conditions	Yield
In ethanol; water byproducts: HCl; mixing hot soln. of hydroxamic acid (aq. alcohol) with metal salt soln. (water) (ratio metal:ligand = 1:1); refluxing on a water-bath, 4-6h; cooling; filtration; drying (desiccator); elem. anal.;	96.7%

N-hydroxy-N-phenyl-nicotinamide (37140-94-6) + lanthanum(III) chloride (10099-58-8) → La(3+)*2C6H5N(O)C(O)C5H4N(1-)*Cl(1-)*H2O={La(C6H5N(O)C(O)C5H4N)2}Cl*H2O

Conditions	Yield
In ethanol; water byproducts: HCl; mixing hot soln. of hydroxamic acid (aq. alcohol) with metal salt soln. (water) (ratio metal:ligand = 1:2); refluxing on a water-bath, 4-6h; cooling; filtration; drying (desiccator); elem. anal.;	96.1%

lanthanum(III) chloride (10099-58-8) + N-hydroxy-N-phenylisonicotinamide (143997-57-3) → La(3+)*2C6H5N(O)C(O)C5H4N(1-)*Cl(1-)*H2O={La(C6H5N(O)C(O)C5H4N)2}Cl*H2O

Conditions	Yield
In ethanol; water byproducts: HCl; mixing hot soln. of hydroxamic acid (aq. alcohol) with metal salt soln. (water) (ratio metal:ligand = 1:2); refluxing on a water-bath, 4-6h; cooling; filtration; drying (desiccator); elem. anal.;	95.7%

N-furoylphenylhydroxylamine (7630-14-0) + lanthanum(III) chloride (10099-58-8) → La(3+)*C6H5N(O)C(O)C4H3O(1-)*2Cl(1-)*2H2O={La(C6H5N(O)C(O)C4H3O)}Cl2*2H2O

Conditions	Yield
In ethanol; water byproducts: HCl; mixing hot soln. of hydroxamic acid (aq. alcohol) with metal salt soln. (water) (ratio metal:ligand = 1:1); refluxing on a water-bath, 4-6h; cooling; filtration; drying (desiccator); elem. anal.;	95.4%

lithium nitride + lithium dinitridoborate + lanthanum(III) chloride (10099-58-8) → lanthanum nitridoborate nitride

Conditions	Yield
With La In neat (no solvent) byproducts: LiCl; under Ar; mixing stoich. amt. of Li3(BN2), LaCl3, Li3N and excess La, added in Ta-ampoule (under Ar), sealed in a quartz tube in vac., heating at 950°C for 3 days, cooled to room temp (1 K/min); LiCl removed by ethanol;	95%

lanthanum(III) chloride (10099-58-8) + warfarin (129-06-6) → La(3+)*3C19H15O4(1-)*6H2O=La(C19H15O4)3*6H2O

Conditions	Yield
In water dropwise addn. of soln. of Ln-salt to soln. of ligand salt (pptn.), stirring (0.5 h); filtration, washing (H2O), drying (vac. desiccator); elem. anal.;	95%

3R,4R-bis(1,3-butandione)-2,2-dimethyldioxolane + water (7732-18-5) + lanthanum(III) chloride (10099-58-8) → (3R,4R-bis(1,3-butandione)-2,2-dimethyldioxolane(2-))3La2*4H2O

Conditions	Yield
With potassium carbonate In methanol addn. of metal salt to a soln. of ligand and K2CO3 in methanol, stirringovernight at room temp.; evapn., extn. with isopropanol, filtration, evapn. in vac.; elem. anal.;	94%

lanthanum(III) chloride (10099-58-8) + sodium hydroxide (1310-73-2) + 4-carboxy-5,8,11-tris(carboxymethyl)-1-phenyl-2-oxa-5,8,11-triazatridecan-13-oic acid (113786-33-7) → disodium [4-carboxy-5,8,11-tris(carboxymethyl)-1-phenyl-2-oxa-5,8,11-triazatridecan-13-oato(5-)]lanthanate(2-)

Conditions	Yield
In water stoich. amts.; addn. of LaCl3 to mixt. of ligand and NaOH, stirring (room temp., 3 h); filtration, desalting (electrodialysis), pH-adjustment to 6.5 (NaOH), evapn. (vac.), drying (2 kPa, 50°C, over P2O5); elem. anal.;	93%

tetrahydrofuran (109-99-9) + KC5Me4iPr + lanthanum(III) chloride (10099-58-8) → (C5Me4(i)Pr)2LaCl2K(tetrahydrofuran)2

Conditions	Yield
In tetrahydrofuran byproducts: KCl; in a nitrogen glovebox, LaCl3 (1.79 mmol) and K(C5Me4(i)Pr) (3.58 mmol) were stirred in THF for 24 h; in silylated glassware; the resulting slurry was filtered; the solvent was removed under vac. from soln.; elem. anal.;	92%

lanthanum(III) chloride (10099-58-8) + 2-thenoyltrifluoroacetone isonicotinoyl hydrazone (29902-30-5) → lanthanum(III), 2-thenoyltrifluoroacetone isonicotinoyl hydrazone complex

Conditions	Yield
With NaOH In methanol; water addn. of soln. of 0.05 mmol of LaCl3 (prepd. by dissolving La2O3 in a stoich. amt. of 1:1 HCl and evapg.) in CH3OH to soln. of C14H10F3N3O2S (1.5 mmol) and NaOH (1.5 mmol) in 1:1 aq. CH3OH; stirring for 0.5 h;; pptn.; filtering, washing with aq. CH3OH and drying in vac. desiccator over molecular sieve; elem. anal.;;	92%

Upstream product

• 10025-84-0 lanthanum(III) chloride hydrated 
• 10025-84-0 lanthanum(III) chloride hexahydrate 
• 7782-50-5 chlorine 
• 10025-84-0 lanthanumtrichloridehydrate 
• 7647-01-0 hydrogenchloride 
• 56-23-5 tetrachloromethane 
• 10025-84-0 lanthanum(III) chloride heptahydrate 
• 51305-40-9 lanthanum chloride hydrate 

Downstream Products

• 1272-23-7 (C₅H₅)3La 
• 7439-91-0 lanthanum 
• 13709-38-1 lanthanum(III) fluoride 
• 7446-09-5 sulfur dioxide 
• 7446-11-9 sulfur trioxide 
• 917-70-4 lanthanum(III) acetate 
• 113971-39-4 La(H₂NSO₂C₆H₄NCHC₆H₄O)3(H₂O)2 
• 1116541-25-3 lanthanum(III) benzoate 
• 262291-32-7 La(C₁₅H₁₃N₄S)Cl₂ 
• 127422-38-2 La⁽³⁺⁾*(O₃S)C₆H₃(COO)(O)^(3-)=La[(O₃S)C₆H₃(COO)(O)] 
• 82429-60-5 LaCl₂(CH₂NH(CH₂)2NC(H)(C₆H₃(OH)(OCH₃)))2(H₂O)2⁽¹⁺⁾*Cl^(1-)*H₂O=[LaCl₂(CH₂NH(CH₂)2NC(H)(C₆H₃(OH)(OCH₃)))2(H₂O)2]Cl*H₂O 

Relevant articles and documents

1D-Polyoxometalate-Based Composite Compounds - Design, Synthesis, Crystal Structures, and Properties of [{Ln(NMP)6}(PMo12O 40)]n (Ln = La, Ce, Pr; NMP = N-methyl-2-pyrrolidone)

The structures of three 1:1 composite compounds prepared with the polyoxometalate (POM) [PMo12O40]3- and the cations [Ln(NMP)6]3+ [Ln = La (1), Ce (3), Pr (2); NMP = N-methyl-2-pyrrolidone] exhibit two types of zig-zag chains with alternating cations and anions through Mo-Ot-Ln-Ot-Mo links in the crystal. The compounds were characterized by IR, UV, and ESR spectroscopy, single-crystal X-ray structural analysis, and by a study of their thermal properties. In all the compounds, the La3+, Pr3+, and Ce3+ centers are eight-coordinate with the oxygen atoms in bicapped trigonal-prismatic geometries. The variation of the average Ln-O separations along the La, Ce, and Pr series is consistent with the effects of the lanthanide contraction. The results of the single-crystal X-ray diffraction analyses and the IR spectroscopic studies are in agreement and both show the metal cation units are coordinatively bonded to the Keggin clusters. The UV spectra of the title compounds suggest that their structures are entirely disrupted in dilute solution. Low-temperature ESR spectra indicate that thermal electron delocalization occurs among the Mo atoms in the three compounds. The results of cyclic voltammetry (CV) show that compounds 1, 2, and 3 all undergo five two-electron reversible reductions and that the [PMo12O 40]3- anions are the active centers for electrochemical redox reactions in solution, while the corresponding cations have only a small effect on the electrochemical properties. Studies of magnetic properties show that 1 is diamagnetic, while 2 and 3 exhibit antiferromagnetic Pr-Pr or Ce-Ce exchange interactions. In addition to the results of CV, the average bond lengths and the magnetic properties of compound 3 indicate that the oxidation state of cerium is iii in the compound of formula [{Ce(NMP) 6}(PMo12O40)]n. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.

Synthesis and structure of the new compound La2O(CN 2)2 possessing an interchanged anion proportion compared to the parent La2O2(CN2)

La2O(CN2)2 was synthesized from a 1:1:2 molar reaction mixture of LaCl3, LaOCl, and Li2(CN 2) at 650°C. Well developed single crystals were grown from a LiCl-KCl flux. The crystal structure was refined as monoclinic (space group C2/c, Z = 2, a = 13.530(2) A, b = 6.250(1) A, c = 6.1017(9) A, β = 104.81(2)°) from single crystal X-ray diffraction data. The La3+ and (CN2)2- ions in the crystal structure of La2O(CN2)2 can be compared to Fe 3+ and S22- ions in the cubic pyrite structure, being arranged like in a distorted NaCl type structure with their centers of gravity. In addition, the O2- ions in La2O(CN 2)2 are occupying 1/4 of the tetrahedral voids formed by the arrangement of metal ions.

Destabilization of LiBH4 by (Ce, La)(Cl, F)3 for hydrogen storage

The mixtures of LiBH4 with halides of Ce or La in a molar ratio of 3:1 were investigated to explore their hydrogen storage properties. The ball milling of LiBH4 with chloride of Ce or La yielded Ce(BH 4)3 and La(BH4)3, while fluoride of Ce or La did not react with LiBH4 during extended ball milling at room temperature. The dehydrogenation temperatures of the ball-milled mixtures were reduced to 220-320 °C, which were much lower than that of pure LiBH4. The diborane emission during hydrogen release was observed at a low level. The dehydrogenation temperature is found to be affected by the composition of rare earth halides, but less influenced by ball milling time. The endothermic dehydrogenation reactions produced lithium halides, hydrides and borides of the corresponding rare earth element. Moreover, the LiBH4 + 1/3(Ce, La)(Cl, F)3 showed partial reversibility through the formation of an unknown borohydride, allowing for a potential hydrogen storage system.

Rare earth halides Ln4X5Z. Part 3: The chloride La4Cl5B4 - Preparation, structure, and relation to La4Br5B4, La4I5B 4

La4Cl5B4 is synthesized by reaction of LaCl3, La metal and boron in sealed Ta containers at 1050 °C a = 16.484(3) A, b = 4.263(1) A, c = 9.276(2) A and β = 120.06(3)°. Ce4Cl5B4 is isotypic, a = 16.391(3) A, b = 4.251(1) A, c = 9.180(2) A and β = 120.20(3)°. The La atoms form strings of trans-edge shared La octahedra, and the B atoms inside the strings form B4-rhomboids, which are condensed to chains via opposite corners. The Cl atoms interconnect the channels according to La2La4/2Cli-i 6/2Cli-a 2/2Cla-i2/2. The crystal structures of the bromide and the iodide are comparabel, however, the interconnection of the strings is different in the three structure types, as 14 Cl, 13 Br and 12 I atoms surround the La6 octahedra.

Lanthanum(III) chloride complexes with heterocyclic Schiff bases : SSynthesis, spectroscopic characterization and thermal studies

Condensation of 2-amino-3-carboxyethyl-4,5,6,7-tetrahydrobenzo[b]thiophene with carbonyl compounds such as isatin, o-hydroxyacetophenone or benzoin in 1:1 ratio in ethanol medium yielded three distinctly different heterocyclic Schiff bases viz. 2-(N-indol

Kinetics and mechanism of the thermal decomposition of lanthanum complexes of 4-N-(4'-antipyrylmethylidene) aminoantipyrine

The kinetics and mechanism of the thermal decomposition of perchlorate, nitrate, chloride, bromide, and iodide complexes of lanthanum with the Schiff base 4-N-(4'-antipyrylmethylidene) aminoantipyrine (abbreviated asAA) have been studied by TG and DTG tec

Thermal decomposition kinetics of lanthanum complexes of 1,2-(diimino-4′-antipyrinyl)ethane

The kinetics and mechanism of the thermal decomposition of perchlorate, nitrate and iodide complexes of lanthanum with the Schiff base 1,2-(diimino-4′-antipyrinyl)ethane (abbreviated as GA) have been studied by TG and DTG techniques. The kinetic parameter

Molecular nitrides with titanium and rare-earth metals

A series of titanium-group 3/lanthanide metal complexes have been prepared by reaction of [{Ti(η5-C5Me5)(μ-NH)} 3(μ3-N)] (1) with halide, triflate, or amido derivatives of the rare-earth metals. Treatment of 1 with metal halide complexes [MCl3(thf)n] or metal trifluoromethanesulfonate derivatives [M(O3SCF3)3] at room temperature affords the cube-type adducts [X3M{(μ3-NH) 3Ti3(η5-C5Me5) 3(μ3-N)}] (X = Cl, M = Sc (2), Y (3), La (4), Sm (5), Er (6), Lu (7); X = OTf, M = Y (8), Sm (9), Er (10)). Treatment of yttrium (3) and lanthanum (4) halide complexes with 3 equiv of lithium 2,6-dimethylphenoxido [LiOAr] produces the aryloxido complexes [(ArO)3M{(μ3- NH)3Ti3(η5-C5Me 5)3(μ3-N)}] (M = Y (11), La (12)). Complex 1 reacts with 0.5 equiv of rare-earth bis(trimethylsilyl)amido derivatives [M{N(SiMe3)2}3] in toluene at 85-180 °C to afford the corner-shared double-cube nitrido compounds [M(μ3-N) 3(μ3-NH)3{Ti3(η5- C5Me5)3(μ3-N)}2] (M = Sc (13), Y (14), La (15), Sm (16), Eu (17), Er (18), Lu (19)) via NH(SiMe 3)2 elimination. A single-cube intermediate [{(Me 3Si)2N}Sc{(μ3-N)2(μ 3-NH)Ti3(η5-C5Me 5)3(μ3-N)}] (20) was obtained by the treatment of 1 with 1 equiv of the scandium bis(trimethylsilyl)amido derivative [Sc{N(SiMe3)2}3]. The X-ray crystal structures of 2, 7, 11, 14, 15, and 19 have been determined. The thermal decomposition in the solid state of double-cube nitrido complexes 14, 15, and 18 has been investigated by thermogravimetric analysis (TGA) and differential thermal analysis (DTA) measurements, as well as by pyrolysis experiments at 1100 °C under different atmospheres (Ar, H2/N2, NH3) for the yttrium complex 14.

Description and Structure of New Compounds Ln//3MO//5XCl//3 (Ln EQUVLNT La, Ce, Pr, Nd, Th; M EQUVLNT Ta, Nb; X EQUVLNT O, OH, F).

La//2ThTaO//6Cl//3, a representative of a group of isostructural Ln//3MO//5XCl//3-type compounds with Ln EQUVLNT La - Nd, Th, X EQUVLNT O, OH, F and M EQUVLNT Ta, Nb, crystallizes in the hexagonal space group P6//3/m. The compound was prepared by the interaction of ThO//2, LaTaO//4 and LaCl//3. Single crystals were obtained by chemical transport reactions (1080 yields 940 degree C) using chlorine as the transport agent. The structure consists of TaO//6 polyhedra with an unusual trigonally prismatic environment for the Ta. La and Th are randomly distributed over the 6(h) sites with a coordination number CN equals 10.

Chlorination of lanthanum oxide

The reactive system La2O3(s)-Cl2(g) was studied in the temperature range 260-950 °C. The reaction course was followed by thermogravimetry, and the solids involved were characterized by X-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy. The results showed that the reaction leads to the formation of solid LaOCl, and for temperatures above 850 °C, the lanthanum oxychloride is chlorinated, producing LaCl3(l). The formation of the oxychloride progresses through a nucleation and growth mechanism, and the kinetic analysis showed that at temperatures below 325 °C the system is under chemical control. The influence of diffusive processes on the kinetics of production of LaOCl was evaluated by studying the effect of the reactive gas flow rate, the mass of the sample, and the chlorine diffusion through the boundary layer surrounding the solid sample. The conversion curves were analyzed and fitted according to the Johnson-Mehl-Avrami description, and the reaction order with respect to the chlorine partial pressure was obtained by varying this partial pressure between 10 and 70 kPa. The rate equation was obtained, which includes the influence of the temperature, chlorine partial pressure, and reaction degree.

Microstructure and desorption properties study of catalyzed NaAlH 4

NaAlH4 catalyzed by Ce(SO4)2 and LaCl 3 have been studied by PCT (Pressure-Content-Temperature) experiment and SEM (Scanning Electron Microscope) test method. The results show that doping with Ce(SO4)2 and LaCl3 increases markedly the desorption amount of NaAlH4. In the first desorption stage, NaAlH4 doped with LaCl3 display larger amount of hydrogen release than NaAlH4 doped with Ce(SO4)2, while, the desorption rate of the latter is obviously faster than the former. SEM analysis shows that heating could make NaAlH4 form a kind of porous structure. The further study indicates that different dopants have different effects on the microstructure of NaAlH4.

Electro-deposition of Co-La alloy films in urea melt and their performances

The Co-La alloy film was electro-deposited in urea melt. The co-deposition behavior, the effect of the cathodic current density on the composition and the surface morphology of the coating were examined, respectively. As a result, lanthanum is co-deposited with cobalt to form Co-La alloy under the inducement effect of cobalt. With the increase of the cathodic current density, La content of the deposit rises at first, then decreases, and reaches a maximal value at the current density of 30 mA cm-2. Meanwhile, the size of the coating particles becomes small. The more content of Co in the deposit is, the more the saturation magnetization is. The crystallization behavior of the coating was studied by using the differential scanning calorimetry and the X-ray diffraction. The as-plated deposit consists of main amorphous phase and a little amount of hexagon cobalt phase (P63/mmc). The amorphous phase was converted into Co-La (Fm3m) phase at 438.9 °C, and hexagon cobalt phase was crystallized into cubic cobalt at 687.1 °C. The electro-catalytic activity of the hydrogen evolution for the Co-La alloy was studied by using electrochemical experiments. The results showed that the electro-catalytic activity of the hydrogen evolution of the alloy is better than that of cobalt.

La3Cl3BC - Structure, bonding and electrical conductivity

A new rare earth carbide boride halide, La3Cl3BC, has been prepared by heating a mixture of stoichiometric quantities of LaCl 3, La, B and C at 1050°C for 10 days. La3Cl 3BC (La3Br3BC type) crystallizes in the monoclinic system with space group P21/m (No. 11), a = 8.2040(16), b = 3.8824(8), c = 11.328(2) A?, β = 100.82(3)°. In the structure, monocapped trigonal prisms containing B-C units are condensed into chains along the b direction, and the chains are further linked by Cl atoms in the a and c directions. The condensation results in a polymeric anion ∞1[BC] with a spine of B atoms in a trigonal prismatic coordination by La, and the C atoms attached in a square pyramidal coordination. The B-B and B-C distances are 2.16 and 1.63 A?, respectively. La3Cl3BC is metallic. The EH calculation shows that the distribution of valence electrons can be formulated as (La3+) 3(Cl-)3(BC)5-·e-.

Zintl anions of silicon in the halides La3Cl2Si3 and La6Br3Si7

La3Cl2Si3 and La6Br3Si7 are prepared at temperatures of around 950 °C from LaX3 (X = Cl, Br), La metal and Si as starting materials. La3Cl2Si3 crystallizes in C2/m with a = 1802(3), b = 420.6(4), c = 1058(2) pm, β= 97.9(2)°, and La6Br3Si7 in Pmmn mit a = 1686.9(2), b = 412.93(11), c = 1185.2(1) pm. In both compounds the Si atoms are located in trigonal prisms of La atoms, which are connected through common triangular and rectangular faces to form layers. The bromine atoms connect the metal atom double layers. In La3Cl2Si3 the Si atoms form zig-zag chains, in La6Br3Si7 chains build up from 1∞-connected Si12 rings. Both compounds are metallic conductors.

High-temperature infrared spectroscopy of YCl3: the vibration spectrum, molecular structure and thermodynamic functions

The infrared spectrum of gaseous YCl3 has been measured at 1400 K and three absorption bands have been found in the 50-600 cm-1 range.Based on a comparison with LaCl3, of which the spectrum was also recorded, it is concluded that the absorption maximum at 370 cm-1 is an overlap of the two stretching frequencies of a pyramidal structure.By spectral deconvolution, the absorption bands could be separated, resulting in the following vibrational assignments: ν1 = 378; ν2 = 78; ν3 = 359; ν4 = 58.6 cm-1.From these data the ideal gas thermodynamic functions have been calculated.

Pulse current electrodeposition of Al from an AlCl3-EMIC ionic liquid

Electrodeposition of aluminum from an AlCl3-EMIC ionic liquid with or without the addition of saturated LaCl3 was carried out by both direct- and pulse-current plating methods. The effects of various parameters, including current density, pulse frequency, current on/off duration (ton and toff), and temperature, on deposit morphology and crystal size were investigated. Deposits prepared by pulse-current plating gave a brighter and flatter surface than those prepared by direct-current plating at appropriate pulse current parameters. Temperature and pulse-current frequency (toff) were shown to significantly affect deposit morphology. Coalescence of grains during toff periods in the pulse current plating was observed, especially at temperatures above 60 °C. Increasing the temperature from 25 to 90 °C caused an increase in deposit grain size and resulted in a change of grain shapes from a small sphere-like form to a feather-like form. As a result, the adhesion of the deposited aluminum to the substrate was lowered. Smaller grain sizes and well-adhered deposits were achieved at lower temperatures. For example, deposition at 25 °C resulted in the smallest crystal size of about 0.3 μm under the conditions of t on = 80 ms, toff = 20 ms, and i = 8 mA/cm2. Furthermore, the addition of LaCl3 to the melt at 60 °C effectively reduced the porosity and improved compactness of deposits.

Luminescent properties of ytterbium-doped ternary lanthanum chloride

Studies of the absorption and temperature dependence of photoluminescence spectra and luminescence decay times of the intra-shell f-f transitions ( 2F5/2 ? 2F7/2) of Yb 3+ ions in K2LaClsu

Synthesis, thermal properties and spectroscopic study of solid mandelate of light trivalent lanthanides

Characterization, thermal stability and thermal decomposition of light trivalent lanthanide mandelates Ln(C6H5CH(OH)CO 2)3·nH2O (Ln = La to Gd, except Pm) were investigated employing simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), experimental and theoretical infrared spectroscopy, elemental analysis, X-ray diffractometry, complexometry and TG-DSC coupled to FTIR. The dehydration of the lanthanum, samarium, europium and gadolinium compounds occurs in a single step while for praseodymium and neodymium ones it occurs in two consecutive steps. The thermal decomposition of the anhydrous compounds occurs in three, four or five consecutive steps, with formation of the respective oxides CeO2, Pr6O11 and Ln2O3 (Ln = La, Nd to Gd) as final residues. The results also provide information concerning the composition, thermal behavior and gaseous products evolved during the thermal decomposition of these compounds. The theoretical and experimental spectroscopic data suggest the possible modes of coordination of the ligand with the lanthanum.