Tantalum (V) fluoride

Structural formula
General
Surname	Tantalum (V) fluoride
other names	Tantalum pentafluoride
Molecular formula	TaF 5
Brief description	colorless solid
External identifiers / databases
EC number	232-022-3
ECHA InfoCard	100.029.111
PubChem	82218
Wikidata	Q2615425
properties
Molar mass	275.94 g mol −1
Physical state	firmly
density	4.74 g cm −3
Melting point	96.8 ° C
boiling point	230 ° C
solubility	Decomposes in water
safety instructions
H and P phrases	H: 301-311-332-314-318
	P: 260-301 + 310-303 + 361 + 353-305 + 351 + 338-361-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tantalum (V) fluoride is an inorganic chemical compound of tantalum from the group of fluorides .

Extraction and presentation

The first synthesis of tantalum (V) fluoride was carried out by Otto Ruff and Emil Schiller at the Technical University of Danzig and submitted for publication on January 15, 1909.

Tantalum (V) fluoride can be obtained by reacting tantalum (V) chloride with hydrogen fluoride .

{\ displaystyle \ mathrm {TaCl_ {5} +5 \ HF \ longrightarrow TaF_ {5} +5 \ HCl}}

The representation from the elements at 300 ° C is also possible

{\ displaystyle \ mathrm {2 \ Ta + 5 \ F_ {2} \ longrightarrow 2 \ TaF_ {5}}}

or the reaction of tantalum with tin (II) fluoride .

{\ displaystyle \ mathrm {2 \ Ta + 5 \ SnF_ {2} \ longrightarrow 2 \ TaF_ {5} +5 \ Sn}}

properties

Tantalum (V) fluoride is a moisture-sensitive, colorless solid that is in the form of highly refractive prisms that dissolve in air. It dissolves in water with hissing to form tantalum oxide fluoride . Smoking and concentrated nitric acid does not dissolve it as violently as water. Cold concentrated sulfuric acid dissolves only small amounts of the compound; it reacts violently with alkali lye and ether. Dry glass is only attacked slowly at room temperature, but quickly at higher temperatures. Tantalum (V) fluoride has a monoclinic crystal structure with the space group C 2 / m (space group no. 12) . Like molybdenum (V) fluoride and tungsten (V) fluoride , tantalum (V) fluoride forms tetrameric units [MF ₄ F _2/2 ] ₄ on the basis of dense cubic packing of fluorine atoms. Template: room group / 12

use

Tantalum (V) fluoride is used in combination with hydrogen fluoride as a catalyst and super acid .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet tantalum (V) fluoride from AlfaAesar, accessed on October 14, 2013 ( PDF )(JavaScript required) .
↑ Otto Ruff: About some new fluorides. In: Chem. Ber. , 1909 , 42 (1), pp. 492-497 ( doi : 10.1002 / cber.19090420175 ).
↑ ^a ^b Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 262.
↑ ^a ^b J. J. Zuckerman: Inorganic Reactions and Methods, The Formation of Bonds to Halogens . John Wiley & Sons, 2009, ISBN 0-470-14539-0 , pp. 288 ( limited preview in Google Book search).
^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 752 ( limited preview in Google Book search).
↑ ^a ^b Ralf Alsfasser, Erwin Riedel, HJ Meyer: Moderne Anorganische Chemie . Walter de Gruyter, 2007, ISBN 3-11-019060-5 , p. 104, 343 ( limited preview in Google Book search).
↑ George A. Olah, GK Surya Prakash, Jean Sommer, Arpad Molnar: Superacid Chemistry . John Wiley & Sons, 2009, ISBN 0-470-42154-1 , pp. 60 ( limited preview in Google Book search).

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet tantalum (V) fluoride from AlfaAesar, accessed on October 14, 2013 ( PDF )(JavaScript required) .

[UF6_1909-2] Otto Ruff: About some new fluorides. In: Chem. Ber. , 1909 , 42 (1), pp. 492-497 ( doi : 10.1002 / cber.19090420175 ).

[brauer-3] Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 262.

[J._J._Zuckerman-4] J. J. Zuckerman: Inorganic Reactions and Methods, The Formation of Bonds to Halogens . John Wiley & Sons, 2009, ISBN 0-470-14539-0 , pp. 288 ( limited preview in Google Book search).

[Jean_d’Ans,_Ellen_Lax,_Roger_Blachnik-5] Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 752 ( limited preview in Google Book search).

[Ralf_Alsfasser,_Erwin_Riedel,_H._J._Meyer-6] Ralf Alsfasser, Erwin Riedel, HJ Meyer: Moderne Anorganische Chemie . Walter de Gruyter, 2007, ISBN 3-11-019060-5 , p. 104, 343 ( limited preview in Google Book search).

[George_A._Olah,_G._K._Surya_Prakash,_Jean_Sommer,_Arpad_Molnar-7] George A. Olah, GK Surya Prakash, Jean Sommer, Arpad Molnar: Superacid Chemistry . John Wiley & Sons, 2009, ISBN 0-470-42154-1 , pp. 60 ( limited preview in Google Book search).