Selenoyl fluoride explained

Selenoyl fluoride, selenoyl difluoride, selenium oxyfluoride, or selenium dioxydifluoride is a chemical compound with the formula SeO₂F₂.

Structure

The shape of the molecule is a distorted tetrahedron with the O-Se-O angle being 126.2°, the O-Se-F angle being 108.0° and F-Se-F being 94.1°.^[1] The Se-F bond length is 1.685 Å and the selenium to oxygen bond is 1.575 Å long.^[2]

Formation

Selenoyl fluoride can be formed by the action of warm fluorosulfonic acid on barium selenate^[3] or selenic acid. SeO₃ + SeF₄ can give this gas along with other oxyfluorides.

Reactions

Selenoyl fluoride is more reactive than its analogon sulfuryl fluoride. It is easier to hydrolyse and to reduce. It may react violently upon contact with ammonia.

Selenoyl fluoride reacting with xenon difluoride gives FXeOSeF₅.^[4]

Notes and References

1. Wai-Kee Li, Gong-du Zhou, Thomas C. W. Mak Advanced structural inorganic chemistry page 651 2008
2. 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
3. Advanced Inorganic Chemistry A Comprehensive Text Cotton and Wilkinson
4. Web site: Noble Gas Compounds . www.scribd.com . dead . https://web.archive.org/web/20121104234856/http://www.scribd.com/doc/30122309/Noble-Gas-Compounds . 2012-11-04.