Samarium

Base Information

• Chemical Name: Samarium
• CAS No.: 7440-19-9
• Deprecated CAS: 110123-52-9,1232308-67-6,1232308-67-6
• Molecular Formula: Sm
• Molecular Weight: 150.36
• Hs Code.: 28053019
• European Community (EC) Number: 231-128-7
• UNII: 42OD65L39F
• DSSTox Substance ID: DTXSID4064688
• Nikkaji Number: J277.946C,J95.315F,J221.539J
• Wikipedia: Samarium
• Wikidata: Q1819
• Mol file: 7440-19-9.mol

Synonyms:Samarium

Chemical Property of Samarium

Chemical Property:

• Appearance/Colour: silvery grey powder
• Melting Point: 1074 °C(lit.)
• Boiling Point: 1794 °C(lit.)
• PSA: 0.00000
• Density: 7.47 g/mL at 25 °C(lit.)
• LogP: 0.00000
• Storage Temp.: water-free area
• Sensitive.: Air & Moisture Sensitive
• Water Solubility.: Insoluble in water.
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 0
• Exact Mass: 151.91974
• Heavy Atom Count: 1
• Complexity: 0

Purity/Quality:

99.9% ^*data from raw suppliers

Samarium ^*data from reagent suppliers

Safty Information:

• Pictogram(s): F,R
• Hazard Codes: F,R,Xn
• Statements: 11-15-33
• Safety Statements: 16-30-33

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Metals -> Rare Earth Metals
• Canonical SMILES: [Sm]
• Recent ClinicalTrials: Effect of Samarium on the Relief of Pain Due to Vertebral Metastases
• General Description: Samarium, a lanthanide rare earth metal, exhibits distinct hydrogen desorption behavior in its hydride form, classified under Group II (with Y, Gd, and Tb), differing from Group I (Ce, Pr, Nd). Its electrochemical reduction in molten LiF-CaF₂ proceeds via a two-step mechanism, but metallic samarium deposition is hindered by solvent discharge, necessitating reactive nickel cathodes to form Sm-Ni alloys. Additionally, samarium nanoparticles, synthesized via bioreduction with pH-dependent size control, show promise in nuclear medicine due to their potential for targeted radionuclide applications and coordination with biomolecules like DTPA-bis-biotin.

Technology Process of Samarium

There total 25 articles about Samarium which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 91.0%

samarium(III) oxide → samarium (7440-19-9)

Guidance literature:

With zirconium; In neat (no solvent); reduction by heating the pressesd mixture (99.05 Sm2O3, purity of reducing reagent >99.5%) to 1100-1200°C at maximal 2E-4 Torr, distn. of Sm, Mo-vessel;;;

Reference yield: 90.0%

samarium(III) oxide + cerium (7440-45-1) → cerium(III) oxide + samarium (7440-19-9)

Guidance literature:

vapor pressure of Sm between 1217 and 1473°K given as equation; optimal conditions: 1200°C, 1E-3 Torr;

Reference yield: 41.0%

samarium(III) nitrate → samarium (7440-19-9)

Guidance literature:

In ethylenediamine; Electrolysis; 150V, 4.4mA/cm**2, 0.37g nitrate in ethylene diamine;;

upstream raw materials:

lanthanum

samarium diiodide

oxygen

sodium

Downstream raw materials:

terephthalic acid

C₆H₄Sm₂Br₂

SmO

Copper Samarium Co-Doped Ceria

Refernces

Highly Stereo- and Regiocontrolled Cyclopentannulation via Allylphosphonate Conjugate Addition and Hydroboration-Oxidation-Elimination. Synthesis of Pentalenic Acid with Virtually Complete Stereo- and Regiocontrol

10.1021/ja00019a051

The research involves the synthesis and study of a lanthanide complex, specifically (CsMeS)Sm (2), which features pentamethylcyclopentadienyl ligands. The study explores the structural characteristics of this complex, noting its unique orientation and flexibility of the ligands, as well as the implications for the potential existence of other (C5Me5)3M complexes involving larger metals. The research also delves into the reactivity of pentamethylcyclopentadienyl-Sm2+ complexes and their potential for interesting chemical reactions. Key chemicals involved in this study include pentamethylcyclopentadienyl ligands, samarium (Sm), and various reagents used in the synthesis and analysis of the complex, such as borane (BH3-THF) for hydroboration, hydrogen peroxide (H2O2) for oxidation, and sodium bicarbonate (NaHCO3) for further chemical transformations.

Synthesis and crystal structures of the samarium complexes [SmI₂(DME)₃] and [Sm₂I(NPPh₃)₅(DME)]

10.1002/(SICI)1521-3749(199911)625:11<1897::AID-ZAAC1897>3.0.CO;2-9

The study investigates the synthesis and crystal structures of two samarium complexes, [SmI2(DME)3] (1) and [Sm2I(NPPh3)5(DME)] (2), formed by reacting samarium metal with N-iodine-triphenylphosphaneimine in 1,2-dimethoxyethane (DME) under ultrasound treatment. Complex 1 is obtained as two different crystallographic forms, brownish-black crystals (1a) and violet-black crystals (1b), while complex 2 forms colorless, moisture-sensitive crystals containing two DME molecules per formula unit. The crystal structures reveal that in 1a and 1b, the samarium atoms have a coordination number of eight, with different I-Sm-I bond angles distinguishing the two forms. In complex 2, the two samarium atoms are linked via μ-N atoms of two phosphoraneiminato ligands to form a planar Sm2N2 four-membered ring, with one samarium atom achieving a distorted tetrahedral environment and the other a distorted octahedral environment through coordination with various ligands.

Catalytic activity of allyl-, azaallyl- and diaza-pentadienyllanthanide complexes for polymerization of methyl methacrylate

10.1016/S0022-328X(98)00977-2

The research focuses on the synthesis and evaluation of various allylic, aza-allylic, and diazapentadienyllanthanide complexes for their catalytic activity in the polymerization of methyl methacrylate (MMA). The purpose of this study was to explore the potential of these non-metallocene type lanthanide complexes as initiators for the polymerization process, aiming to achieve high molecular weight and isotactic polymers. The researchers synthesized a range of compounds, including divalent samarium and ytterbium complexes with different ligands such as bis(2-pyridylphenylmethyl)dimethylsilane. The study concluded that certain complexes, particularly those with aza-allyl ligands, exhibited high catalytic activity, yielding high molecular weight isotactic polymers with narrow molecular weight distributions.