Thionyl tetrafluoride
Chemical compound / From Wikipedia, the free encyclopedia
Thionyl tetrafluoride, also known as sulfur tetrafluoride oxide, is an inorganic compound with the formula SOF4. It is a colorless gas.
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Names | |||
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IUPAC name
Thionyl tetrafluoride | |||
Identifiers | |||
3D model (JSmol) |
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ChemSpider |
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PubChem CID |
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CompTox Dashboard (EPA) |
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Properties | |||
SOF4 | |||
Appearance | colorless gas | ||
Density | 1.653−0.0036T (°C) liquid[1] | ||
Melting point | −99.6 °C (−147.3 °F; 173.6 K) | ||
Boiling point | −49 °C (−56 °F; 224 K) 5090 cal/mol heat of vapourisation[1] | ||
reaction in water | |||
log P | 7.2349−859.58/T−26275/T²[1] | ||
Structure | |||
distorted trigonal bipyramid | |||
Hazards | |||
GHS labelling: | |||
Danger | |||
H300, H310, H314, H330 | |||
P260, P262, P264, P270, P271, P280, P284, P301+P310, P301+P330+P331, P302+P350, P303+P361+P353, P304+P340, P305+P351+P338, P310, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501 | |||
Related compounds | |||
Related oxohalides |
Thionyl fluoride Selenyl tetrafluoride | ||
Related compounds |
Phosphoryl trifluoride pentafluorosulfur hypofluorite sulfuryl fluoride | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The shape of the molecule is a distorted trigonal bipyramid, with the oxygen found on the equator. The atoms on the equator have shorter bond lengths than the fluorine atoms on the axis. The sulfur oxygen bond is 1.409Å. A S−F bond on the axis has length 1.596Å and the S−F bond on the equator has length 1.539Å. The angle between the equatorial fluorine atoms is 112.8°. The angle between axial fluorine and oxygen is 97.7°. The angle between oxygen and equatorial fluorine is 123.6° and between axial and equatorial fluorine is 85.7°.[2] The fluorine atoms only produce one NMR line, probably because they exchange positions.[1] It is isoelectronic with phosphorus pentafluoride.