Chromium(IV) fluoride

Chromium tetrafluoride

α - chromium tetrafluoride: green black solid β - chromium tetrafluoride: dark purple crystalline solid

Fixed

α -chromium tetrafluoride: sublimated at 100 ° C. β - chromium tetrafluoride: melts at 227 ° C

α - chromium tetrafluoride: hydrolyzed in water

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Chromium ( IV ) fluoride, chromium tetrafluoride, is a chemical compound of the elements chromium and fluorine, the chromium in the oxidation state IV occupies. This compound exist two forms: the α - chromium tetrafluoride ( green black solid which sublimes at 100 ° C) and β - chromium tetrafluoride ( dark purple, crystalline solid that melts at 227 ° C).

Production and representation

α - chromium tetrafluoride can be obtained at higher temperatures of the elements:

Other ways for the reaction of fluorine with chromium (III ) fluoride, or chromium (III ) chloride:

β -chromium tetrafluoride is obtained by Langzeitthermolyse chromium ( V ) fluoride:

Properties

Physical Properties

α - chromium tetrafluoride is made up of chains of trans- edge-sharing octahedra CrF6. β -chromium tetrafluoride is composed of rings of 4 cis- corner linked octahedra CrF6, which are linked via common trans -position fluorine atoms to form tubes, each CrF6 octahedra remaining two cis- free fluorine atoms.

Chemical Properties

Chrome tetrafluoride together with fluorides more anionic fluoro complexes: CrF5, which are composed of CrF6 - octahedra common fluorine atoms; CrF62, which are constructed and CrF73 - octahedral.