Bromine monofluoride

Bromine monofluoride
Names
	IUPAC name Bromine monofluoride
Identifiers
CAS Number	13863-59-7;
3D model (JSmol)	Interactive image;
ChemSpider	20474212;
PubChem CID	139632;
UN number	1745
CompTox Dashboard (EPA)	DTXSID60160735 ;
	InChI InChI=1S/BrF/c1-2 Key: MZJUGRUTVANEDW-UHFFFAOYSA-N;
	SMILES FBr;
Properties
Chemical formula	BrF
Molar mass	98.903 g/mol
Density	4.403 g/L
Melting point	−33 °C (−27 °F; 240 K)
Boiling point	20 °C (68 °F; 293 K) (decomposes)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Bromine monofluoride is a quite unstable interhalogen compound with the chemical formula BrF. It can be produced through the reaction of bromine trifluoride (or bromine pentafluoride) and bromine. Due to its lability, the compound can be detected but not isolated:^[2]

BrF₃ + Br₂ → 3 BrF

BrF₅ + 2 Br₂ → 5 BrF

Br_2(l) + F_2(g) → 2 BrF_(g)

It is usually generated in the presence of caesium fluoride.^[3]

Bromine monofluoride decomposes at normal temperature through dismutation to bromine trifluoride, bromine pentafluoride, and free bromine.

The molecular structure in the gas phase was determined by microwave spectroscopy; the bond length is r_e = 1.758981(50) Å.^[4]

The bond length in a cocrystal with methylchloride is 1.822(2) Å; the lengthening relative to the free molecule is due to an interaction of the type F-Br···ClMe with a distance of 2.640(1) Å.^[5]

References

^ ^a ^b ^c David R. Lide: CRC Handbook of Chemistry and Physics. 89. Auflage, Taylor & Francis, 2008, ISBN 978-1-4200-6679-1, S. 4–53.
^ Macintyre, J. E.; Daniel, F. M.; Stirling, V. M. (1992). Dictionary of Inorganic Compounds. CRC Press. p. 285. ISBN 978-0-412-30120-9.
^ Winter, Rolf; Terjeson, Robin J.; Gard, Gary L. (1998). "An Improved and Facile Preparation of SF₅Br". Journal of Fluorine Chemistry. 89: 105–106. doi:10.1016/S0022-1139(98)00094-3.
^ Nair, K. P. R. (1979). "Electric dipole moment of diatomic interhalogen molecules,". Kem. Kozl. 52: 431.
^ Drews, Thomas; Seppelt, Konrad (October 2012). "Bromine Monofluoride". Zeitschrift für anorganische und allgemeine Chemie. 638 (12–13): 2106–2110. doi:10.1002/zaac.201200293.

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[crc-1] David R. Lide: CRC Handbook of Chemistry and Physics. 89. Auflage, Taylor & Francis, 2008, ISBN 978-1-4200-6679-1, S. 4–53.

[2] Macintyre, J. E.; Daniel, F. M.; Stirling, V. M. (1992). Dictionary of Inorganic Compounds. CRC Press. p. 285. ISBN 978-0-412-30120-9.

[3] Winter, Rolf; Terjeson, Robin J.; Gard, Gary L. (1998). "An Improved and Facile Preparation of SF₅Br". Journal of Fluorine Chemistry. 89: 105–106. doi:10.1016/S0022-1139(98)00094-3.

[4] Nair, K. P. R. (1979). "Electric dipole moment of diatomic interhalogen molecules,". Kem. Kozl. 52: 431.

[5] Drews, Thomas; Seppelt, Konrad (October 2012). "Bromine Monofluoride". Zeitschrift für anorganische und allgemeine Chemie. 638 (12–13): 2106–2110. doi:10.1002/zaac.201200293.

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See also

References