Chromium oxytetrafluoride

Chromium oxytetrafluoride
Names
	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
Appearance	purple solid
Melting point	55 °C (131 °F; 328 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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]

Synthesis

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

CrO₂F₂ + KrF₂ → CrOF₄ + 0.5 O₂ + Kr

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

References

^ Hope, Eric G.; Jones, Peter J.; Levason, William; Ogden, J. Steven; Tajik, Mahmoud; Turff, Jeremy W. (1 January 1985). "Characterisation of chromium(VI) oxide tetrafluoride, CrOF4, and caesium pentafluoro-oxochromate(VI) Cs[CrOF5]". Journal of the Chemical Society, Dalton Transactions (3): 529–533. doi:10.1039/DT9850000529. ISSN 1364-5447. Retrieved 18 July 2024.
^ Mallela, S. P.; Shreeve, Jean'ne M.; DesMarteau, Darryl D. (January 1992). "Chromium(V) Fluoride and Chromium(VI) Tetrafluoride Oxide". Inorganic Syntheses. 29: 124–127. doi:10.1002/9780470132609.ch29.
^ Christe, Karl O.; Wilson, William W.; Bougon, Roland A. (1986). "Synthesis and Characterization of CrF₄O, KrF₂.CrF₄O, and NO⁺CrF₅O^-". Inorganic Chemistry. 25 (13): 2163–2169. doi:10.1021/ic00233a013.
^ Mercier, Hélène P. A.; Breddemann, Ulf; Brock, David S.; Bortolus, Mark R.; Schrobilgen, Gary J. (2019). "Syntheses, Structures, and Bonding of NGF₂⋅CrOF₄, NGF₂⋅2CrOF₄ (Ng=Kr, Xe), and (CrOF₄)_∞". Chemistry – A European Journal. 25 (52): 12105–12119. doi:10.1002/chem.201902005. PMID 31172609.

[1] Hope, Eric G.; Jones, Peter J.; Levason, William; Ogden, J. Steven; Tajik, Mahmoud; Turff, Jeremy W. (1 January 1985). "Characterisation of chromium(VI) oxide tetrafluoride, CrOF4, and caesium pentafluoro-oxochromate(VI) Cs[CrOF5]". Journal of the Chemical Society, Dalton Transactions (3): 529–533. doi:10.1039/DT9850000529. ISSN 1364-5447. Retrieved 18 July 2024.

[2] Mallela, S. P.; Shreeve, Jean'ne M.; DesMarteau, Darryl D. (January 1992). "Chromium(V) Fluoride and Chromium(VI) Tetrafluoride Oxide". Inorganic Syntheses. 29: 124–127. doi:10.1002/9780470132609.ch29.

[3] Christe, Karl O.; Wilson, William W.; Bougon, Roland A. (1986). "Synthesis and Characterization of CrF₄O, KrF₂.CrF₄O, and NO⁺CrF₅O^-". Inorganic Chemistry. 25 (13): 2163–2169. doi:10.1021/ic00233a013.

[4] Mercier, Hélène P. A.; Breddemann, Ulf; Brock, David S.; Bortolus, Mark R.; Schrobilgen, Gary J. (2019). "Syntheses, Structures, and Bonding of NGF₂⋅CrOF₄, NGF₂⋅2CrOF₄ (Ng=Kr, Xe), and (CrOF₄)_∞". Chemistry – A European Journal. 25 (52): 12105–12119. doi:10.1002/chem.201902005. PMID 31172609.

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