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13755-29-8

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13755-29-8 Usage

Description

Sodium tetrafluoroborate is an organic compound that has the molecular formula NaBF4. The compound is a salt that forms white or colorless water-soluble rhombic crystals. It is less soluble in organic solvents and readily soluble in water.

Preparation

Sodium tetrafluoroborate can be prepared by reacting tetrafluoroboric with sodium carbonate or hydroxide. NaOH + HBF4 → NaBF4 + H2O Na2CO3 + 2 HBF4 → 2 NaBF4 + H2O + CO2

Applications

Sodium tetrafluoroborate can be used as a catalyst for the synthesis of bis(indolyl)methanes via electrophilic substitution reaction of indoles with ketones and aldehydes. In the synthesis of ionic liquids such as trihexyl(tetradecyl)phosphonium tetrafluoroborat and 1-butyl-3-methylimidazolium tetrafluoroborate. In the laboratory, sodium tetrafluoroborate may be used for the synthesis of boron fluoride. It may also be used in the synthesis of fluoroheterocyclic and fluoro-nucleic acids. The compound is also used in metal finishing, fluxes, and plating circuits.

Chemical Properties

white crystals or powder

Uses

Different sources of media describe the Uses of 13755-29-8 differently. You can refer to the following data:
1. Fluorinating agent, see Lawton, Levy, J. Am. Chem. Soc. 77, 6083 (1955).
2. Sodium Tetrafluoroborate is used in various metal finishing and plating circuits.
3. Sodium tetrafluoroborate may be used for the laboratory synthesis of boron fluoride. It may be used for the synthesis of fluoro-nucleic acids and fluoroheterocyclic compounds.

General Description

Sodium tetrafluoroborate (NaBF4) is colorless sodium salt and its crystals belong to the rhombic crystal system. It can be synthesized by reacting tetrafluoroboric acid with sodium carbonate or hydroxide.

Flammability and Explosibility

Notclassified

Safety Profile

Moderately toxic by subcutaneous route. When heated to decomposition it emits toxic fumes of Fand Na2O.

Purification Methods

Crystallise the fluoroborate from hot water (50mL/g) by cooling to 0o. Alternatively, free it from insoluble material by dissolving it in a minimum amount of water; then fluoride ions are removed by adding concentrated lanthanum nitrate in excess. After removing lanthanum fluoride by centrifugation, the supernatant is passed through a cation-exchange column (Dowex 50, Na+-form) to remove any remaining lanthanum [Anbar & Guttman J Phys Chem 64 1896 1960]. It has also been recrystallised from anhydrous MeOH and dried in a vacuum at 70o for 16hours. Keep it dry as it is hygrosopic. [Delville et al. J Am Chem Soc 109 7293 1987.]

Check Digit Verification of cas no

The CAS Registry Mumber 13755-29-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,7,5 and 5 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 13755-29:
(7*1)+(6*3)+(5*7)+(4*5)+(3*5)+(2*2)+(1*9)=108
108 % 10 = 8
So 13755-29-8 is a valid CAS Registry Number.
InChI:InChI=1/BFO2.2Na/c2-1(3)4;;/q-2;2*+1

13755-29-8 Well-known Company Product Price

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  • Alfa Aesar

  • (11562)  Sodium tetrafluoroborate, 95%   

  • 13755-29-8

  • 500g

  • 489.0CNY

  • Detail
  • Alfa Aesar

  • (11562)  Sodium tetrafluoroborate, 95%   

  • 13755-29-8

  • 2kg

  • 1001.0CNY

  • Detail
  • Alfa Aesar

  • (A12393)  Sodium tetrafluoroborate, 97%   

  • 13755-29-8

  • 100g

  • 227.0CNY

  • Detail
  • Alfa Aesar

  • (A12393)  Sodium tetrafluoroborate, 97%   

  • 13755-29-8

  • 500g

  • 505.0CNY

  • Detail
  • Alfa Aesar

  • (A12393)  Sodium tetrafluoroborate, 97%   

  • 13755-29-8

  • 2kg

  • 1683.0CNY

  • Detail
  • Sigma-Aldrich

  • (71525)  Sodiumtetrafluoroborate  puriss. p.a., ≥98.0% (T)

  • 13755-29-8

  • 71525-50G

  • 718.38CNY

  • Detail
  • Sigma-Aldrich

  • (71525)  Sodiumtetrafluoroborate  puriss. p.a., ≥98.0% (T)

  • 13755-29-8

  • 71525-250G

  • 2,059.20CNY

  • Detail
  • Vetec

  • (V900192)  Sodiumtetrafluoroborate  Vetec reagent grade, 98%

  • 13755-29-8

  • V900192-500G

  • 98.28CNY

  • Detail
  • Sigma-Aldrich

  • (202215)  Sodiumtetrafluoroborate  98%

  • 13755-29-8

  • 202215-25G

  • 497.25CNY

  • Detail
  • Sigma-Aldrich

  • (202215)  Sodiumtetrafluoroborate  98%

  • 13755-29-8

  • 202215-500G

  • 758.16CNY

  • Detail
  • Sigma-Aldrich

  • (202215)  Sodiumtetrafluoroborate  98%

  • 13755-29-8

  • 202215-10KG

  • 11,460.15CNY

  • Detail

13755-29-8SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017

1.Identification

1.1 GHS Product identifier

Product name Sodium tetrafluoroborate

1.2 Other means of identification

Product number -
Other names sodium,tetrafluoroborate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:13755-29-8 SDS

13755-29-8Synthetic route

dimanganese decacarbonyl
10170-69-1

dimanganese decacarbonyl

tricarbonyl(cyclohexadienyl)iron tetrafluoroborate

tricarbonyl(cyclohexadienyl)iron tetrafluoroborate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

(OC)3Fe(μ-η4:η1-cyclohexadiene)Mn(CO)5
135224-95-2

(OC)3Fe(μ-η4:η1-cyclohexadiene)Mn(CO)5

Conditions
ConditionsYield
With sodium amalgam In tetrahydrofuran (Ar), reduced Mn-complex (45 min at 0°C, 30 min at 20°C) added at -70°C, stirred for 1 h; solvent removed in vacuo at -30°C, extracted four times with pentane at -25°C (Mn2(CO)10 as by-product), extracted two times with CH2Cl2, solvent removed, dried in high vacuum, (all steps at <-20°C), elem. anal.;A n/a
B 98%
sodium tetrahydroborate
16940-66-2

sodium tetrahydroborate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

borane tetrahydrofuran

borane tetrahydrofuran

Conditions
ConditionsYield
With BF3 In tetrahydrofuran introduction of BF3 into suspn. of NaBH4 in THF with stirring (-8-(-12)°C, 6 h), stirring (12h, room temp.), addn. of further NaBF4, stirring (2 h); condensing in to N2 cooled Dewar-vessel (25°C, 50 Torr), warming (room temp.); (11)B-NMR;A n/a
B 97.5%
sodium tetrahydroborate
16940-66-2

sodium tetrahydroborate

BF3-triglymate

BF3-triglymate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

diborane
19287-45-7

diborane

Conditions
ConditionsYield
In further solvent(s) soln. NaBH4 in triglyme was added slowly for 1 h at room temp. to BF3-triglymate; B2H6 was absorbed with THF, NaBF4 was filtered off, solvent was removedby distillation to obtaine more NaBF4;A 97%
B >99
C6H4FN2(1+)*C6BF8(1-)
1516885-12-3

C6H4FN2(1+)*C6BF8(1-)

sodium fluoride

sodium fluoride

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

para-difluorobenzene
540-36-3

para-difluorobenzene

C

C6BF14(1-)*Na(1+)

C6BF14(1-)*Na(1+)

D

C6BF14(1-)*Na(1+)

C6BF14(1-)*Na(1+)

Conditions
ConditionsYield
at 160 - 170℃; Glovebox;A 5%
B 95%
C 83%
D 10%
sodium tetrahydroborate
16940-66-2

sodium tetrahydroborate

BF3-monoglymate
1020537-36-3

BF3-monoglymate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

diborane
19287-45-7

diborane

Conditions
ConditionsYield
In further solvent(s) soln. NaBH4 in triglyme was added slowly for 3 h at room temp. to BF3-monoglymate; B2H6 was absorbed with THF, NaBF4 was filtered off, solvent was removedby distillation to obtaine more NaBF4;A 94%
B >99
sodium tetrahydroborate
16940-66-2

sodium tetrahydroborate

BF3-tetraglymate

BF3-tetraglymate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

diborane
19287-45-7

diborane

Conditions
ConditionsYield
In further solvent(s) soln. NaBH4 in tetraglyme was added slowly for 3 h at room temp. to BF3-tetraglymate; B2H6 was absorbed with THF, NaBF4 was filtered off, solvent was removedby distillation to obtaine more NaBF4;A 94%
B >99
pyridinium tetrafluoroborate

pyridinium tetrafluoroborate

sodium hydroxide
1310-73-2

sodium hydroxide

A

pyridine
110-86-1

pyridine

B

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

Conditions
ConditionsYield
In water addn. of NaOH to C5H5NHBF4; extn. of pyridine with CHCl3, concn., elem. anal.;A n/a
B 94%
sodium tetrahydroborate
16940-66-2

sodium tetrahydroborate

BF3-tert-butyl methyl etherate
123334-27-0

BF3-tert-butyl methyl etherate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

diborane
19287-45-7

diborane

Conditions
ConditionsYield
In further solvent(s) soln. NaBH4 in triglyme was added slowly for 3 h at room temp. to BF3-tert-butyl methyl etherate; B2H6 was absorbed with THF, NaBF4 was filtered off, solvent was removedby distillation to obtaine more NaBF4;A 93%
B >99
[Ru(η(5)-C5H5)(C(CH=CPh2)=NHnPr)(CO)(PiPr3)]BF4

[Ru(η(5)-C5H5)(C(CH=CPh2)=NHnPr)(CO)(PiPr3)]BF4

sodium methylate
124-41-4

sodium methylate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

[Ru(η(5)-C5H5)(C(CH=CPh2)=NnPr)(CO)(PiPr3)]
252981-67-2

[Ru(η(5)-C5H5)(C(CH=CPh2)=NnPr)(CO)(PiPr3)]

Conditions
ConditionsYield
In tetrahydrofuran byproducts: MeOH; stirring (1 h); evapn. (vac.), pptn. on toluene addn., filtering, evapn., washing (pentane); elem. anal.;A n/a
B 90%
[Ru(η(5)-C5H5)(C(CH=CPh2)=NHPh)(CO)(PiPr3)]BF4

[Ru(η(5)-C5H5)(C(CH=CPh2)=NHPh)(CO)(PiPr3)]BF4

sodium methylate
124-41-4

sodium methylate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

[Ru(η(5)-C5H5)(C(CH=CPh2)=NHPh)(CO)(PiPr3)]
252981-68-3

[Ru(η(5)-C5H5)(C(CH=CPh2)=NHPh)(CO)(PiPr3)]

Conditions
ConditionsYield
In tetrahydrofuran byproducts: MeOH; stirring (1 h); evapn. (vac.), pptn. on toluene addn., filtering, evapn., washing (pentane); elem. anal.;A n/a
B 90%
Na[(η5-cyclopentadienyl)(nitrosyl)(carbonyl)(cyano)Mo]

Na[(η5-cyclopentadienyl)(nitrosyl)(carbonyl)(cyano)Mo]

trimethoxonium tetrafluoroborate
420-37-1

trimethoxonium tetrafluoroborate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

Dimethyl ether
115-10-6

Dimethyl ether

C

[(η5-cyclopentadienyl)Mo(nitrosyl)(carbonyl)(CNCH3)]

[(η5-cyclopentadienyl)Mo(nitrosyl)(carbonyl)(CNCH3)]

Conditions
ConditionsYield
In acetonitrile under N2, Mo complex dissolved in CH3CN, Me3OBF4 added, stirred at roomtemp. for 0.5 h; evapd., C6H6 added to residue, filtered, solvent removed, dried in vac., recrystd. from hexane with small quantity of CH2Cl2 at -50°C, elem. anal.;A n/a
B n/a
C 85%
[Ru(η(5)-C5H5)(C(CH=CPh2)=NEt2)(CO)(PiPr3)]BF4

[Ru(η(5)-C5H5)(C(CH=CPh2)=NEt2)(CO)(PiPr3)]BF4

sodium methylate
124-41-4

sodium methylate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

[Ru(η(5)-C5H5)(C(NEt2)=C=CPh2)(CO)(PiPr3)]
252981-61-6

[Ru(η(5)-C5H5)(C(NEt2)=C=CPh2)(CO)(PiPr3)]

Conditions
ConditionsYield
In tetrahydrofuran byproducts: MeOH; stirring (1 h); evapn. (vac.), toluene addn., filtering, evapn., washing (pentane); elem. anal.;A n/a
B 85%
[Ru(η(5)-C5H5)(C(CH=CPh2)=NC5H10)(CO)(PiPr3)]BF4

[Ru(η(5)-C5H5)(C(CH=CPh2)=NC5H10)(CO)(PiPr3)]BF4

sodium methylate
124-41-4

sodium methylate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

[Ru(η(5)-C5H5)(C(NC5H10)=C=CPh2)(CO)(PiPr3)]
252981-62-7

[Ru(η(5)-C5H5)(C(NC5H10)=C=CPh2)(CO)(PiPr3)]

Conditions
ConditionsYield
In tetrahydrofuran byproducts: MeOH; stirring (1 h); evapn. (vac.), toluene addn., filtering, evapn., washing (pentane); elem. anal.;A n/a
B 80%
Na[(η5-cyclopentadienyl)(nitrosyl)(carbonyl)(cyano)Mo]

Na[(η5-cyclopentadienyl)(nitrosyl)(carbonyl)(cyano)Mo]

triethyloxonium fluoroborate
368-39-8

triethyloxonium fluoroborate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

diethyl ether
60-29-7

diethyl ether

C

[(η5-cyclopentadienyl)Mo(nitrosyl)(carbonyl)(CNC2H5)]

[(η5-cyclopentadienyl)Mo(nitrosyl)(carbonyl)(CNC2H5)]

Conditions
ConditionsYield
In acetonitrile under N2, Mo complex dissolved in MeCN, added Et3OBF4, stirred for 0.5 h at room temp.; solvent evapd. in vac., added C6H6, filtered, solvent removed, dried invac., recrystd. from hexane with small quantity of CH2Cl2 at -50°C, elem. anal.;A n/a
B n/a
C 80%
sodium tetrahydroborate
16940-66-2

sodium tetrahydroborate

((η-C5Me5)Ir(η6-3-methylbenzo{b}thiophene))(BF4)2
112068-95-8

((η-C5Me5)Ir(η6-3-methylbenzo{b}thiophene))(BF4)2

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4
114032-59-6

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4

C

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4
114032-57-4

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4

D

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4
114032-55-2

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4

E

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4
114032-53-0

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4

Conditions
ConditionsYield
In dichloromethane; water To a stirred soln. of Cp(CH3)5Ir(3-MeBT)(BF4)2 in H2O and CH2Cl2 was added NaBH4 (under N2).; After 3 min the layers were sepd., and the water layer was extd. with CH2Cl2. The combined CH2Cl2 extracts were dried over Na2SO4 and filtered. Product was pptd. by addn. of Et2O. elem. anal.; ratio of isomers: 58:27:8:7;A n/a
B n/a
C n/a
D n/a
E 79%
Na[(η5-cyclopentadienyl)(nitrosyl)(carbonyl)(cyano)W]

Na[(η5-cyclopentadienyl)(nitrosyl)(carbonyl)(cyano)W]

trimethoxonium tetrafluoroborate
420-37-1

trimethoxonium tetrafluoroborate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

Dimethyl ether
115-10-6

Dimethyl ether

C

[(η5-cyclopentadienyl)W(nitrosyl)(carbonyl)(CNCH3)]

[(η5-cyclopentadienyl)W(nitrosyl)(carbonyl)(CNCH3)]

Conditions
ConditionsYield
In acetonitrile under N2, W complex dissolved in CH3CN, Me3OBF4 added, stirred at room temp. for 0.5 h; evapd., C6H6 added to residue, filtered, solvent removed, dried in vac., recrystd. from hexane with small quantity of CH2Cl2 at -50°C, elem. anal.;A n/a
B n/a
C 79%
C6H4FN2(1+)*C6BF8(1-)
1516885-12-3

C6H4FN2(1+)*C6BF8(1-)

sodium fluoride

sodium fluoride

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

para-difluorobenzene
540-36-3

para-difluorobenzene

C

C6BF8(1-)*Na(1+)
1516885-20-3

C6BF8(1-)*Na(1+)

Conditions
ConditionsYield
at 160 - 170℃; Glovebox;A 11%
B 79%
C 71%
sodium tetrahydroborate
16940-66-2

sodium tetrahydroborate

{C5(CH3)5IrC8H6S}(2+)*2(BF4)(1-)={C5(CH3)5IrC8H6S}(BF4)2
114033-27-1

{C5(CH3)5IrC8H6S}(2+)*2(BF4)(1-)={C5(CH3)5IrC8H6S}(BF4)2

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

{C5(CH3)5IrC8H7S}(1+)*(BF4)(1-)={C5(CH3)5IrC8H7S}BF4
114032-47-2

{C5(CH3)5IrC8H7S}(1+)*(BF4)(1-)={C5(CH3)5IrC8H7S}BF4

C

{C5(CH3)5IrC8H7S}(1+)*(BF4)(1-)={C5(CH3)5IrC8H7S}BF4
114032-51-8

{C5(CH3)5IrC8H7S}(1+)*(BF4)(1-)={C5(CH3)5IrC8H7S}BF4

D

{C5(CH3)5IrC8H7S}(1+)*(BF4)(1-)={C5(CH3)5IrC8H7S}BF4
114032-49-4

{C5(CH3)5IrC8H7S}(1+)*(BF4)(1-)={C5(CH3)5IrC8H7S}BF4

E

{C5(CH3)5IrC8H7S}(1+)*(BF4)(1-)={C5(CH3)5IrC8H7S}BF4
114057-28-2

{C5(CH3)5IrC8H7S}(1+)*(BF4)(1-)={C5(CH3)5IrC8H7S}BF4

Conditions
ConditionsYield
In dichloromethane; water H2O and CH2Cl2 were purged with N2 for 5 min. To this stirred soln. was added (C5(CH3)5Ir(BT))(BF4)2 and then NaBH4. After 5 min the layers were separated, and the water layer was extracted with CH2Cl2.; After 5 min the layers were separated, and the water layer was extd. with CH2Cl2. The combined CH2Cl2 extracts were dried over Na2SO4 and filtered. Product was pptd. by addn. of ether. elem. anal.; ratio of isomers: 61:25:8:6;A n/a
B n/a
C n/a
D n/a
E 78%
sodium tetrahydroborate
16940-66-2

sodium tetrahydroborate

{C5(CH3)5Ir(CH3)C8H5S}(2+)*2(BF4)(1-)={C5(CH3)5Ir(CH3)C8H5S}(BF4)2
114032-45-0

{C5(CH3)5Ir(CH3)C8H5S}(2+)*2(BF4)(1-)={C5(CH3)5Ir(CH3)C8H5S}(BF4)2

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4
114032-65-4

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4

C

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4
114032-63-2

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4

D

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4
114057-30-6

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4

E

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4
114032-61-0

{C5(CH3)5Ir(CH3)C8H6S}(1+)*(BF4)(1-)={C5(CH3)5Ir(CH3)C8H6S}BF4

Conditions
ConditionsYield
In dichloromethane; water H2O and CH2Cl2 were purged with N2 for 5 min. To this stirred soln. was added (C5(CH3)5Ir(2-MeBT))(BF4)2 and then NaBH4.; After 5 min the layers were sepd., and the water layer was extd. with CH2Cl2. The combined CH2Cl2 extracts were dried over Na2SO4 and filtered. Product was pptd. by addn. of Et2O. elem. anal.; ratio of isomers: 60:23:9:8;A n/a
B n/a
C n/a
D n/a
E 78%
C6H4FN2(1+)*C8BF18(1-)

C6H4FN2(1+)*C8BF18(1-)

sodium fluoride

sodium fluoride

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

para-difluorobenzene
540-36-3

para-difluorobenzene

C

C8F14
85794-30-5

C8F14

D

C8BF18(1-)*Na(1+)

C8BF18(1-)*Na(1+)

E

C8BF18(1-)*Na(1+)

C8BF18(1-)*Na(1+)

Conditions
ConditionsYield
at 160 - 170℃; Glovebox;A 17%
B 77%
C 3%
D 65%
E 12%
C6H4FN2(1+)*C3BF6(1-)
1516885-17-8

C6H4FN2(1+)*C3BF6(1-)

sodium fluoride

sodium fluoride

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

para-difluorobenzene
540-36-3

para-difluorobenzene

C

C3BF6(1-)*Na(1+)
1516885-27-0

C3BF6(1-)*Na(1+)

D

C3HF3*Na(1+)

C3HF3*Na(1+)

Conditions
ConditionsYield
at 160 - 170℃; Glovebox;A 76%
B 51%
C 9%
D 76%
(η5-C5H5)Mo(NO)2BF4

(η5-C5H5)Mo(NO)2BF4

sodium tetraphenyl borate
143-66-8

sodium tetraphenyl borate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

(η5-C5H5)Mo(NO)2Ph

(η5-C5H5)Mo(NO)2Ph

C

triphenylborane
960-71-4

triphenylborane

Conditions
ConditionsYield
In dichloromethane N2-atmosphere; 1 h; filtration (Al2O3), evapn. (vac.);A n/a
B 75%
C n/a
[(η(5)-cyclopentadienylditrosyl)Cr]BF4

[(η(5)-cyclopentadienylditrosyl)Cr]BF4

sodium tetraphenyl borate
143-66-8

sodium tetraphenyl borate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

B

(η5-C5H5)Cr(NO)2Ph

(η5-C5H5)Cr(NO)2Ph

C

triphenylborane
960-71-4

triphenylborane

Conditions
ConditionsYield
In dichloromethane N2-atmosphere; 1 h; filtration (Al2O3), evapn. (vac.);A n/a
B 74%
C n/a
tricarbonyl(cyclohexadienyl)iron tetrafluoroborate

tricarbonyl(cyclohexadienyl)iron tetrafluoroborate

disodium tetracarbonylosmate

disodium tetracarbonylosmate

A

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

{(OC)3Fe(μ-η4:η1-cyclohexadienyl)}2Os(CO)4
135560-34-8

{(OC)3Fe(μ-η4:η1-cyclohexadienyl)}2Os(CO)4

Conditions
ConditionsYield
In tetrahydrofuran (Ar), added at -70°C, after 1 h warmed to -30°C; solvent removed at -30°C, dissolved in CH2Cl2 at room temp., centrifugation, reduced to dryness, dried for 2 h in vacuo, elem. anal.;A n/a
B 71%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

Ethyl 4-amino-N-(3,4-dichlorobenzyl)indole-2-carboxylate
220677-63-4

Ethyl 4-amino-N-(3,4-dichlorobenzyl)indole-2-carboxylate

N-(3,4-dichlorobenzyl)-2-ethoxycarbonylindole-4-diazonium tetrafluoroborate
287482-04-6

N-(3,4-dichlorobenzyl)-2-ethoxycarbonylindole-4-diazonium tetrafluoroborate

Conditions
ConditionsYield
With hydrogenchloride; sodium nitrite In phosphorus pentaoxide; water100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

iron(II) chloride tetrahydrate

iron(II) chloride tetrahydrate

bis[(2-pyridyl)methyl]amine
1539-42-0

bis[(2-pyridyl)methyl]amine

bis(2,2'-dipicolylamine)iron(II) tetrafluoroborate

bis(2,2'-dipicolylamine)iron(II) tetrafluoroborate

Conditions
ConditionsYield
With ascorbic acid In water addn. of aq. ligand soln. to aq. FeCl2 soln. (contg. ascorbic acid to reduce Fe(III)) under N2, ratio Fe : Dipica = 1:2.1, addn. of excess NaBF4;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

(1-hexadecyl-1,4,8,11,-tetra-azacyclotetradecane)nickel(II) perchlorate

(1-hexadecyl-1,4,8,11,-tetra-azacyclotetradecane)nickel(II) perchlorate

(1-hexadecyl-1,4,8,11,-tetra-azacyclotetradecane)nickel(II) tetrafluoroborate

(1-hexadecyl-1,4,8,11,-tetra-azacyclotetradecane)nickel(II) tetrafluoroborate

Conditions
ConditionsYield
In dichloromethane; water A CH2Cl2 layer of Ni(HNC2H4NHC3H6NHC2H4N(C16H33)C3H6)(ClO4)2 is equilibrated with an aq. layer of NaBF4.; The ClO4(1-) ions are quantitatively replaced by the BF4(1-) ions forming the complex Ni(HNC2H4NHC3H6NHC2H4N(C16H33)C3H6)(BF4)2.;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

[Ni(S((CH2)2SCH2C(CH3)NO)2H)(H2O)](1+)*ClO4(1-)=[Ni(S((CH2)2SCH2C(CH3)NO)2H)]ClO4*H2O
284669-89-2

[Ni(S((CH2)2SCH2C(CH3)NO)2H)(H2O)](1+)*ClO4(1-)=[Ni(S((CH2)2SCH2C(CH3)NO)2H)]ClO4*H2O

A

Ni(2+)*(S((CH2)2SCH2C(CH3)NO)2BF2)(1-)*ClO4(1-)=[Ni(S((CH2)2SCH2C(CH3)NO)2BF2)]ClO4

Ni(2+)*(S((CH2)2SCH2C(CH3)NO)2BF2)(1-)*ClO4(1-)=[Ni(S((CH2)2SCH2C(CH3)NO)2BF2)]ClO4

B

Ni(2+)*S((CH2)2SCH2C(CH3)NO)2H(1-)*BF4(1-)=Ni(S((CH2)2SCH2C(CH3)NO)2H)BF4

Ni(2+)*S((CH2)2SCH2C(CH3)NO)2H(1-)*BF4(1-)=Ni(S((CH2)2SCH2C(CH3)NO)2H)BF4

Conditions
ConditionsYield
In methanolA 0%
B 100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

pentakis(dimethylamino)-ethylamino-ethyliminobiphosphonium ditetrafluoroborate

pentakis(dimethylamino)-ethylamino-ethyliminobiphosphonium ditetrafluoroborate

1,1,1,3,3-pentakis(dimethylamino)-3-ethylamino-1λ5,3λ5-diphosphazenium tetrafluoroborate

1,1,1,3,3-pentakis(dimethylamino)-3-ethylamino-1λ5,3λ5-diphosphazenium tetrafluoroborate

Conditions
ConditionsYield
With potassium chloride In dichloromethane; water; acetonitrile byproducts: KBF4; aq. soln. of KCl added to aq. soln. of complex, KBF4 filtered, soln. concd. in vac. to dryness, residue dissolved in MeCN and refluxed for 72 h,cooled to room temp., concd. to dryness then dissolved in CH2Cl2, shake d with aq. soln. of NaBF4; org. phase dried with Na2SO4, concd. in vac., dried at 0.05 Torr; pure by (1)H NMR;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer

dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer

dichloromethane
75-09-2

dichloromethane

(C6F5)(C6H5)PC6H4SCH3
486403-20-7

(C6F5)(C6H5)PC6H4SCH3

[(η5-C5(CH3)5RhCl(C6F5)PhPC6H4SMe-2]BF4

[(η5-C5(CH3)5RhCl(C6F5)PhPC6H4SMe-2]BF4

Conditions
ConditionsYield
In not given Atherton, M. J.; Fawcett, J.; Holloway, J. H.; Hope, E. G.; Karacar, A.;Russell, D. R.; Saunders, G. C. J. Chem. Soc., Dalton Trans. 1996, 321 5; elem. anal.;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

zinc(II) nitrate hexahydrate

zinc(II) nitrate hexahydrate

[Cu2(C12H6N2)4(C6H4)6(OCH2CH2)12O2](2+)*2BF4(1-)=[Cu2(C12H6N2)4(C6H4)6(OCH2CH2)12O2][BF4]2

[Cu2(C12H6N2)4(C6H4)6(OCH2CH2)12O2](2+)*2BF4(1-)=[Cu2(C12H6N2)4(C6H4)6(OCH2CH2)12O2][BF4]2

[CuZn(C12H6N2)4(C6H4)6(OCH2CH2)12O2](3+)*3BF4(1-)=[CuZn(C12H6N2)4(C6H4)6(OCH2CH2)12O2][BF4]3

[CuZn(C12H6N2)4(C6H4)6(OCH2CH2)12O2](3+)*3BF4(1-)=[CuZn(C12H6N2)4(C6H4)6(OCH2CH2)12O2][BF4]3

Conditions
ConditionsYield
In dichloromethane room tepm., pptn., addn. of excess of NaBF4; crystn. (C6H6/CH2Cl2);100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

(E)-1-((dibutyl(3-hydroxy-3-methylbut-1-en-1-yl)stannyl)hexyl)-3-ethyl-1H-imidazol-3-ium bromide
1441047-44-4, 1441047-65-9

(E)-1-((dibutyl(3-hydroxy-3-methylbut-1-en-1-yl)stannyl)hexyl)-3-ethyl-1H-imidazol-3-ium bromide

(E)-1-(6-(dibutyl(3-hydroxy-3-methylbut-1-en-1-yl)stannyl)hexyl)-3-ethyl-1H-imidazol-3-ium tetrafluoroborate
1441047-52-4

(E)-1-(6-(dibutyl(3-hydroxy-3-methylbut-1-en-1-yl)stannyl)hexyl)-3-ethyl-1H-imidazol-3-ium tetrafluoroborate

Conditions
ConditionsYield
In acetone at 20℃; for 24h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

2-(diacetoxyiodo)mesitylene
33035-41-5

2-(diacetoxyiodo)mesitylene

2-Methoxyphenylboronic acid
5720-06-9

2-Methoxyphenylboronic acid

C16H18IO(1+)*BF4(1-)

C16H18IO(1+)*BF4(1-)

Conditions
ConditionsYield
Stage #1: 2-(diacetoxyiodo)mesitylene; 2-Methoxyphenylboronic acid With boron trifluoride diethyl etherate In dichloromethane at 0 - 20℃;
Stage #2: sodium tetrafluoroborate In dichloromethane; water for 0.5h;
100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

(S)-1-(2-benzyloxypropyl)-3-butylimidazolium bromide

(S)-1-(2-benzyloxypropyl)-3-butylimidazolium bromide

(S)-1-(2-benzyloxypropyl)-3-butylimidazolium tetrafluoroborate

(S)-1-(2-benzyloxypropyl)-3-butylimidazolium tetrafluoroborate

Conditions
ConditionsYield
In water at 20℃; for 5h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

C160H137N32Pd8(8+)*8NO3(1-)

C160H137N32Pd8(8+)*8NO3(1-)

8BF4(1-)*C160H137N32Pd8(8+)

8BF4(1-)*C160H137N32Pd8(8+)

Conditions
ConditionsYield
In water at 60℃;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

1,3-dimethyl-4-(3′,4′,5′-trimethoxyphenyl)-5-(4″-methoxyphenyl)imidazolium iodide
1352428-90-0

1,3-dimethyl-4-(3′,4′,5′-trimethoxyphenyl)-5-(4″-methoxyphenyl)imidazolium iodide

4-(3,4,5-trimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-dimethylimidazolium tetrafluoroborate

4-(3,4,5-trimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-dimethylimidazolium tetrafluoroborate

Conditions
ConditionsYield
In acetone at 20℃; for 24h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

4-(3-chloro-4,5-dimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-diethylimidazolium iodide
1627130-80-6

4-(3-chloro-4,5-dimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-diethylimidazolium iodide

4-(3-chloro-4,5-dimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-diethylimidazolium tetrafluoroborate

4-(3-chloro-4,5-dimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-diethylimidazolium tetrafluoroborate

Conditions
ConditionsYield
In acetone at 20℃; for 24h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

4-(3-bromo-4,5-dimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-diethylimidazolium iodide
1627130-81-7

4-(3-bromo-4,5-dimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-diethylimidazolium iodide

4-(3-bromo-4,5-dimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-diethylimidazolium tetrafluoroborate

4-(3-bromo-4,5-dimethoxyphenyl)-5-(4-methoxyphenyl)-1,3-diethylimidazolium tetrafluoroborate

Conditions
ConditionsYield
In acetone at 20℃; for 24h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

BF4(1-)*C71H92N4O5*C24H32O8*H(1+)

BF4(1-)*C71H92N4O5*C24H32O8*H(1+)

methyl iodide
74-88-4

methyl iodide

2BF4(1-)*C72H95N4O5(1+)*C24H32O8*H(1+)

2BF4(1-)*C72H95N4O5(1+)*C24H32O8*H(1+)

Conditions
ConditionsYield
Stage #1: BF4(1-)*C71H92N4O5*C24H32O8*H(1+); methyl iodide at 20℃; for 72h; Inert atmosphere; Schlenk technique;
Stage #2: sodium tetrafluoroborate In dichloromethane; water; acetone at 20℃; for 18h;
100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

BF4(1-)*C72H95N4O5(1+)*C24H32O8

BF4(1-)*C72H95N4O5(1+)*C24H32O8

2BF4(1-)*C72H95N4O5(1+)*C24H32O8*H(1+)

2BF4(1-)*C72H95N4O5(1+)*C24H32O8*H(1+)

Conditions
ConditionsYield
Stage #1: BF4(1-)*C72H95N4O5(1+)*C24H32O8 With hydrogenchloride In diethyl ether; dichloromethane at 20℃; for 1h;
Stage #2: sodium tetrafluoroborate In dichloromethane; water; acetone at 20℃; for 18h;
100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

C33H49ClIrN2P

C33H49ClIrN2P

hydrogen
1333-74-0

hydrogen

C33H51IrN2P(1+)*BF4(1-)

C33H51IrN2P(1+)*BF4(1-)

Conditions
ConditionsYield
In dichloromethane-d2 at 25℃; under 1500.15 Torr; for 120h; Inert atmosphere;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

1,1'-bis(4-iodophenyl)-[4,4'-bipyridine]-1,1'-diium dichloride

1,1'-bis(4-iodophenyl)-[4,4'-bipyridine]-1,1'-diium dichloride

C22H16I2N2(2+)*2BF4(1-)

C22H16I2N2(2+)*2BF4(1-)

Conditions
ConditionsYield
In water at 20℃; for 6h; Inert atmosphere;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

C28H34IN2O(1+)*C7H8O3S*C7H7O3S(1-)

C28H34IN2O(1+)*C7H8O3S*C7H7O3S(1-)

(2,4,6-trimethylphenyl)(palonosetron)iodonium ditetrafluoroborate

(2,4,6-trimethylphenyl)(palonosetron)iodonium ditetrafluoroborate

Conditions
ConditionsYield
In dichloromethane; water100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

1,3-diethyl-5-ferrocenyl-4-phenylimidazolium iodide

1,3-diethyl-5-ferrocenyl-4-phenylimidazolium iodide

1,3-diethyl-4-ferrocenyl-5-phenylimidazolium tetrafluoroborate

1,3-diethyl-4-ferrocenyl-5-phenylimidazolium tetrafluoroborate

Conditions
ConditionsYield
In acetone at 20℃; for 24h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

N,N'-(methylene)bis(N,N-dimethyl-1-(4-vinylphenyl)methanaminium) chloride

N,N'-(methylene)bis(N,N-dimethyl-1-(4-vinylphenyl)methanaminium) chloride

N,N'-(methylene)bis(N,N-dimethyl-1-(4-vinylphenyl)methanaminium) tetrafluoroborate

N,N'-(methylene)bis(N,N-dimethyl-1-(4-vinylphenyl)methanaminium) tetrafluoroborate

Conditions
ConditionsYield
In water at 20℃; for 12h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

C9H19N2O2(1+)*Cl(1-)

C9H19N2O2(1+)*Cl(1-)

C9H19N2O2(1+)*BF4(1-)

C9H19N2O2(1+)*BF4(1-)

Conditions
ConditionsYield
In ethanol for 2h; Sonication;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

4-[4-(1-hexylpyridin-1-ium-4-yl)phenyl]-1,2,6-tri-p-tolylpyridin-1-ium iodide tetrafluoroborate

4-[4-(1-hexylpyridin-1-ium-4-yl)phenyl]-1,2,6-tri-p-tolylpyridin-1-ium iodide tetrafluoroborate

4-[4-(1-hexylpyridin-1-ium-4-yl)phenyl]-1,2,6-tri-p-tolylpyridin-1-ium bis(tetrafluoroborate)

4-[4-(1-hexylpyridin-1-ium-4-yl)phenyl]-1,2,6-tri-p-tolylpyridin-1-ium bis(tetrafluoroborate)

Conditions
ConditionsYield
In methanol; water for 0.5h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

1,1'”-diphenyl-[4,2’:5’,3”:6”,4'”-quaterpyridine]-1,1'”-diium ditriflate

1,1'”-diphenyl-[4,2’:5’,3”:6”,4'”-quaterpyridine]-1,1'”-diium ditriflate

1,1”‘-diphenyl-[4,2’:5’,3’‘:6’‘,4’‘‘-quaterpyridine]-1,1’‘‘-diium bis(tetrafluoroborate)

1,1”‘-diphenyl-[4,2’:5’,3’‘:6’‘,4’‘‘-quaterpyridine]-1,1’‘‘-diium bis(tetrafluoroborate)

Conditions
ConditionsYield
In methanol; water for 0.5h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

1-[3-tris(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)silylpropyl]-3,5-bis(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)pyridinium iodide

1-[3-tris(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)silylpropyl]-3,5-bis(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)pyridinium iodide

1-[3-tris(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)silylpropyl]-3,5-bis(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)pyridinium tetrafluoroborate

1-[3-tris(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)silylpropyl]-3,5-bis(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)pyridinium tetrafluoroborate

Conditions
ConditionsYield
In water; acetone at 20℃; for 5h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

1-methyl-3-(2-(3-methyl-2-oxoimidazolidin-1-yl)ethyl)-1H-imidazol-3-ium chloride

1-methyl-3-(2-(3-methyl-2-oxoimidazolidin-1-yl)ethyl)-1H-imidazol-3-ium chloride

1-methyl-3-(2-(3-methyl-2-oxoimidazolidin-1-yl)ethyl)-1H-imidazol-3-ium tetrafluoroborate

1-methyl-3-(2-(3-methyl-2-oxoimidazolidin-1-yl)ethyl)-1H-imidazol-3-ium tetrafluoroborate

Conditions
ConditionsYield
In methanol at 20℃; for 24h;100%
sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

C39H47N2(1+)*Br(1-)

C39H47N2(1+)*Br(1-)

C39H47N2(1+)*BF4(1-)

C39H47N2(1+)*BF4(1-)

Conditions
ConditionsYield
In water; acetone at 20℃;100%
In water; acetone at 20℃; for 0.75h;94%
In water; acetone at 20℃; for 1h;89%
In methanol; water at 20℃; for 1h; Inert atmosphere;

13755-29-8Relevant articles and documents

Solvation of Anions in Water-Acetonitrile Mixtures

Miyaji, Kiyoshi,Morinaga, Kenichi

, p. 1695 - 1700 (1986)

The enthalpies of transfer from water to mixtures with acetonitrile (ΔH0t) for various anions reach maxima at a mole fraction of acetonitrile (χAN) ca. 0.3, and decrease linearly and in parallel in the intermediate region.A linear relation is found between ΔH0t at χAN 0.3 and the hydration enthalpies for halide and symmetrical ions.This finding and the parallel χAN dependence of ΔH0t in the intermediate region are interpreted on the basis of the linear relation between the solvation enthalpies and the entropies for the halide ions.The reduction in the hydrogen-bonding interaction extending beyond the primary hydration sphere (ΔHINT) for halide ions in the mixtures is estimated based on a modified Eley and Evans hydration model.At χAN 0 to ca. 0.3, ΔHINT compared with that in water agree well with the observed ΔH0t, indicating that the increase in ΔH0t is due to the reduction in the outer hydration sphere interaction.However, they split gradually at χAN above 0.3.The adequacy of the modifications in the treatment of the solvation enthalpy cycle in the mixtures is re-evaluated from the structural viewpoint.The exothermic change in the intermediate region may be attributable to the reduction in the cavity formation energy.

Carba-closo-dodecaborates – Synthesis, Structure, and Energetics

Hepp, Alexander,Labbow, René,Rei?, Fabian,Schulz, Axel,Villinger, Alexander

, p. 2905 - 2914 (2018)

A full set of analytical data of salts (e.g., Me3NH+, Cs+, Ag+) bearing nido-[B11H14]–, closo-[CHB11H11]–, and chlorinated congener [CHB11Cl11]– is reported. Structures and energetics of [CHB11H11–nXn]– and [B12XmH12–m]2– (n = 5, 11; m = 0, 12; X = halogen, CH3, CF3) and their protonated and silylated forms are studied. A direct correlation between theoretical calculated NICS values, gas-phase acidities, and experimentally determined 13C NMR shifts is discussed.

Syntheses of tricyanofluoroborates M[BF(CN)3] (M = Na, K): (CH3)3SiCl catalysis, countercation effect, and reaction intermediates

Sprenger, Jan A. P.,Landmann, Johannes,Drisch, Michael,Ignatev, Nikolai,Finze, Maik

, p. 3403 - 3412 (2015)

Potassium tricyanofluoroborate, K[BF(CN)3], which is the starting material for tricyanofluoroborate room-temperature ionic liquids [N. Ignatev et al. J. Fluorine Chem., submitted] was obtained on a molar scale (140 g) from Na[BF4] and (CH3)3SiCN with a purity of up to 99.9%. The initial product of the reaction that was catalyzed by (CH3)3SiCl was Na[BF(CN)3]·(CH3)3SiCN that was characterized by multinuclear NMR and vibrational spectroscopy, elemental analysis, differential scanning calorimetry, and single-crystal X-ray diffraction. Na[BF(CN)3]·(CH3)3SiCN was converted to K[BF(CN)3] via a simple extraction protocol. The catalytic effect of (CH3)3SiCl was evaluated and some intermediates of the reaction, including the isocyanoborate anion [BF(NC)(CN)2]-, were identified using multinuclear NMR and vibrational spectroscopy. K[BF2(CN)2] also reacted with (CH3)3SiCN in the presence of (CH3)3SiCl, to result in K[BF(CN)3]. The interpretation of the experimental observations was supported by data derived from density functional theory (DFT) calculations. In addition, the influence of selected countercations of the tetrafluoroborate anion on the progress of the (CH3)3SiCl-catalyzed reaction was studied. The fastest reaction was observed for Na[BF4], while the conversion of [BF4]- to [BF(CN)3]- was slower with the countercation K+. Li[BF4] and [Et4N][BF4] were converted under the reaction conditions applied to Li[BF2(CN)2] and [Et4N][BF2(CN)2] only.

Tris(5-methylpyrazolyl)methane: Synthesis and properties of its iron(II) complex

Goodman, Margaret A.,Nazarenko, Alexander Y.,Casavant, Barbara J.,Li, Zhanjie,Brennessel, William W.,Demarco, Michael J.,Long, Gen,Goodman, M. Scott

, p. 1084 - 1093 (2012)

The new ligand, tris(5-methylpyrazolyl)methane (1), has been prepared by the reaction of n-butyl lithium with tris(pyrazolyl)methane followed by trimethylation of the tetralithiated species with methyl iodide. The BF 4-, ClO4-, and BPh 3CN- salts of the Fe(II) complex of this ligand were also synthesized. The X-ray crystal structure of the BF4- complex (2) at 100 K had Fe-N bond lengths of 1.976 A, indicative of a low spin Fe(II) complex, while at room temperature, the structure of this complex had a Fe-N bond distance close to 2.07 A, indicative of an admixture of approximately 50% low-spin and 50% high-spin. The solid-state structure of the complex with a ClO4- counterion was determined at 5 different temperatures between 173 and 293 K, which allowed the thermodynamic parameters for the spin-crossover to be estimated. Moessbauer spectra of the BF4- complex further support spin-state crossover in the solid state with a transition temperature near 300 K. UV-visible spectroscopy and 1H NMR studies of 2 show that the transition temperature in solution is closer to 400 K. No spin-crossover was observed for [Fe(1) 2]2+·2BPh3CN-. The results allow the separation of effects of groups in the 3-position from those in the 5-position on tpm ligands, and also point toward a small cooperative effect in the spin-crossover for the Fe(II) complex.

Calorimetric study of alkali metal tetrafluoroborates

Gavrichev,Sharpataya,Gorbunov

, p. 225 - 238 (1996)

Adiabatic calorimetric investigation of the low-temperature heat capacity of sodium tetrafluoroborate as well as a DSC study of the thermal behavior of potassium tetrafluoroborate and of lithium tetrafluoroborate and its hydrates were carried out. Temperatures and enthalpies of phase transitions at temperature above ambient were determined for potassium tetrafluoroborate, lithium tetrafluoroborate, and lithium tetrafluoroborate mono- and trihydrate. It was demonstrated that lithium tetrafluoroborate has only one phase transition in the solid at 300 K.

Synthesis and properties of diacetatodinitrosylmolybdenum complex as precursor for olefin metathesis catalyst

Keller

, p. L9-L11 (1989)

Reaction of the [Mo(NO)2]2+ moiety with a suitable ligands is a very convenient method to synthesize different dinitrosylmolybdenum complexes. It was also applied for the synthesis of a new compound of empirical formula Mo(NO)2(O2CMe)2. The reaction of catalyst precursor with EtAlCl2 was spectroscopically examined (IR in the v(NO) region). Reagent concentrations were as in the metathesis reaction. The reaction between Mo(NO)2(O2CMe)2 and EtAlCl2 is accompanied by liberation of ethane. During the stable period of the system (decrease in intensity of the bands v(NO) 1%) one molar equivalent (vs. precursor concentration) of ethane evolved.

Thermal decomposition of 4-fluorobenzenediazonium perfluoroorganyl(fluoro) borates, [4-FC6H4N2]Y (Y = RFBF 3 (RF = C6F5, C6F 13, trans-C4F9CFCF, cis-C6F 13CFCF, CF3CC) and (C6F13) 2BF2)

Bardin, Vadim V.,Frohn, Hermann-Josef

, p. 333 - 338 (2014/01/06)

Heating of the neat salts [4-FC6H4N 2][RFBF3] (RF = C6F 5, C6F13, trans-C4F9CFCF, cis-C6F13CFCF, CF3CC) or in solid mixtures with NaF gives the principal product 1,4-C6F2H4 besides RFBF2 or Na[RFBF3], respectively. Thermolysis of [4-FC6H4N2] [(C6F13)2BF2] in NaF results in 1,4-C6F2H4, Na[BF4], Na[(C 6F13)2BF2], and a new type of product, the isomer Na[C6F13CF(BF3)C 5F11].

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