Selenoyl fluoride
Names
Other names
selenoyl difluoride, selenium oxyfluoride, or selenium dioxydifluoride
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/F2O2Se/c1-5(2,3)4 X markN
    Key: VCPFQVXWYPMUKZ-UHFFFAOYSA-N X markN
  • InChI=1/F2O2Se/c1-5(2,3)4
    Key: VCPFQVXWYPMUKZ-UHFFFAOYAS
  • O=[Se](=O)(F)F
Properties
SeO2F2
Molar mass 148.95 g/mol
Appearance colorless gas
Melting point −99.5 °C (−147.1 °F; 173.7 K)[1]
Boiling point −8.4 °C (16.9 °F; 264.8 K)[2]
Related compounds
Other cations
 SO2F2
Related compounds
 SeF6,
SeO3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Selenoyl fluoride is the inorganic compound with the formula SeO2F2. It is a colorless, corrosive gas.[2]

Structure

The molecule has a distorted tetrahedral shape with the following bond angles: O-Se-O = 126.2°, O-Se-F = 108.0°. and F-Se-F = 94.1°.[3] The Se-F bond length is 1.685 Å and the selenium to oxygen distancesare 1.575 Å.[4]

Formation

Selenoyl fluoride can be produced by the action of warm fluorosulfonic acid on selenic acid:[2]

HSO3F + H2SeO4 → H2O + SeO2F2 + H2SO4

Barium selenate can be used in place of the selenic acid.[5] Treatment of SeO3 with SeF4 give this gas along with other oxyfluorides.

Reactions

Selenoyl fluoride is more reactive than its lighter homologue sulfuryl fluoride. It hydrolyzes more easily. It is a strong oxidant. It reacts violently with ammonia, for example. It attacks glass.[2]

Selenoyl fluoride reacte with xenon difluoride to give FXeOSeF5.[6]

References

  1. ^ CRC Handbook of Chemistry and Physics
  2. ^ a b c d Konrad Seppelt (1980). "Selenonyl difluoride". Inorganic Syntheses. 20: 36. doi:10.1002/9780470132517.ch9..
  3. ^ Wai-Kee Li, Gong-du Zhou, Thomas C. W. Mak Advanced structural inorganic chemistry page 651 2008 ISBN 0-19-921694-0
  4. ^ Kolbjørn Hagen, Virginia R. Cross and Kenneth Hedberg "The molecular structure of selenonyl fluoride, SeO2F2, and sulfuryl fluoride, SO2F2, as determined by gas-phase electron diffraction" Journal of Molecular Structure 1978 volume 44 issue 2 page 187 doi:10.1016/0022-2860(78)87027-6
  5. ^ Advanced Inorganic Chemistry A Comprehensive Text Cotton and Wilkinson
  6. ^ "Noble Gas Compounds". www.scribd.com. Archived from the original on 2012-11-04.