Cobalt (III) fluoride

Crystal structure
	__ Co 3+ __ F -
General
Surname	Cobalt (III) fluoride
other names	Cobalt trifluoride
Ratio formula	CoF 3
Brief description	light brown powder
External identifiers / databases
EC number	233-062-4
ECHA InfoCard	100.030.045
PubChem	66208
Wikidata	Q419602
properties
Molar mass	115.93 g mol −1
Physical state	firmly
density	3.88 g cm −3 at 25 ° C; 2.19 g cm −3 at 25 ° C (dihydrate);
Melting point	927 ° C
solubility	reacts with water
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 314
	P: 260-280-303 + 361 + 353-304 + 340 + 310-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cobalt (III) fluoride is a chemical compound of cobalt from the group of fluorides .

Extraction and presentation

Cobalt (III) fluoride can be obtained by reacting cobalt (II) fluoride , cobalt (II) chloride or cobalt (III) oxide with fluorine .

{\ displaystyle \ mathrm {2 \ CoF_ {2} + F_ {2} \ longrightarrow 2 \ CoF_ {3}}}

{\ displaystyle \ mathrm {2 \ CoCl_ {2} +3 \ F_ {2} \ longrightarrow 2 \ CoF_ {3} +2 \ Cl_ {2}}}

{\ displaystyle \ mathrm {2 \ Co_ {2} O_ {3} +6 \ F_ {2} \ longrightarrow 4 \ CoF_ {3} +3 \ O_ {2}}}

properties

Cobalt (III) fluoride is a light brown powder that immediately turns dark brown in moist air. That is why the pure substance is kept airtight in vessels made of glass, quartz or metal. It volatilizes in a flow of fluorine gas at 600–700 ° C., whereby it largely decomposes beforehand into cobalt (II) fluoride and fluorine. It reacts with water to generate oxygen , and cobalt (III) hydroxide is also formed. It also occurs as a dihydrate. Cobalt (III) fluoride crystallizes in a vanadium (III) fluoride layer structure.

use

Cobalt (III) fluoride can be used to fluorinate organic compounds using the Fowler process .

Individual evidence

↑ ^a ^b ^c ^d 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. 276.
↑ ^a ^b ^c Datasheet Cobalt (III) fluoride from Sigma-Aldrich , accessed on May 25, 2017 ( PDF ).
↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-60.
↑ Web elements: Cobalt trifluoride
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1684.

[brauer-1] 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. 276.

[Sigma-2] Datasheet Cobalt (III) fluoride from Sigma-Aldrich , accessed on May 25, 2017 ( PDF ).

[CRC_HANDBOOK-3] David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-60.

[webelements-4] Web elements: Cobalt trifluoride

[5] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1684.