Tellurium hexafluoride

Structural formula
General
Surname	Tellurium hexafluoride
other names	Tellurium (VI) fluoride
Molecular formula	TeF 6
Brief description	colorless gas with a repulsive, disgusting odor
External identifiers / databases
EC number	232-027-0
ECHA InfoCard	100.029.115
PubChem	24559
Wikidata	Q419396
properties
Molar mass	241.59 g mol −1
Physical state	gaseous
density	4.006 g cm −3 (−191 ° C); 2.499 g cm −3 (liquid at −10 ° C under pressure); 10.915 kg m −3 (gaseous, 0 ° C, 1013 mBar);
Sublimation point	−38.9 ° C
safety instructions
H and P phrases	H: 330-314
	P: ?
MAK	Switzerland: 0.02 ml m −3 or 0.2 mg m −3
Thermodynamic properties
ΔH f 0	−1319 kJ mol −1
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tellurium hexafluoride (TeF ₆ ) is an inorganic chemical compound of the elements tellurium and fluorine . Tellurium is in its highest oxidation state + VI. Under normal conditions tellurium hexafluoride is a colorless, poisonous gas.

presentation

Similar to selenium hexafluoride , tellurium hexafluoride can be produced from the elements (direct synthesis).

{\ displaystyle {\ ce {Te + 3 F2 -> TeF6}}}

It can also be made by fluorinating tellurium dioxide with bromine trifluoride .

properties

Physical Properties

Tellurium hexafluoride is physically interesting due to its relatively high density in gas form . Its critical temperature is 83.3 ° C, the triple point temperature is -37.7 ° C.

Crystal structures of tellurium hexafluoride

Chemical properties

In contrast to its sulfur analogue, tellurium hexafluoride is not inert. TeF ₆ is hydrolyzed to telluric acid H ₆ TeO ₆ in water .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Entry on tellurium hexafluoride in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
↑ Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 197.
↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 7783-80-4 or tellurium hexafluoride ), accessed on November 2, 2015.
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 628.
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 175.

literature

Gmelin's Handbook of Inorganic Chemistry , System No. 11, Tellurium, Part B 2, pp. 19-30.
WC Cooper: Tellurium , Van Nostrand Reinhold Company, New York, USA, 1971.
KW Bagnall: The Chemistry of Selenium, Tellurium and Polonium , Elsevier Publishing, New York, 1966.
RT Sanderson: Chemical Periodicity , Reinhold, New York, USA, 1960.

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g Entry on tellurium hexafluoride in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .

[brauer-2] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 197.

[3] Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 7783-80-4 or tellurium hexafluoride ), accessed on November 2, 2015.

[HOWI_0628-4] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 628.

[Arnold_F._Holleman,_Egon_Wiberg,_Nils_Wiberg-5] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 175.