Chromium oxytetrafluoride

Chromium oxytetrafluoride is the inorganic compound with the formula CrOF₄. It is a purple, volatile, diamagnetic solid. The compound is classified as an oxyfluoride.^[1][2]

Chromium oxytetrafluoride

Names
IUPAC name Chromium(VI) tetrafluoride oxide
Other names Chromium fluoride oxide Chromium oxide tetrafluoride Chromium tetrafluoride oxide
Identifiers
CAS Number	23276-90-6
3D model (JSmol)	Interactive image
InChI InChI=1S/Cr.4FH.O/h;4*1H;/q+4;;;;;/p-4 Key: MHSCZPAMCXOZTI-UHFFFAOYSA-J
SMILES F[Cr](F)(F)(F)=O
Properties
Chemical formula	CrOF4
Molar mass	143.989 g·mol−1
Appearance	purple solid
Melting point	55 °C (131 °F; 328 K)
Related compounds
Other cations	Molybdenum oxytetrafluoride Tungsten oxytetrafluoride
Related compounds	Chromyl fluoride Thionyl tetrafluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

It can be prepared by fluorination of chromyl fluoride with krypton difluoride:^[3]

2 CrO₂F₂ + 2 KrF₂ → 2 CrOF₄ + O₂ + 2 Kr

The compound serves as a weak Lewis base with noble gas difluorides.^[4] It also binds fluoride to give the pentafluoride.