Thionyl tetrafluoride

Thionyl tetrafluoride
Names
	IUPAC name Thionyl tetrafluoride
Identifiers
CAS Number	13709-54-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	123077 ;
PubChem CID	139557;
CompTox Dashboard (EPA)	DTXSID30160060 ;
	InChI InChI=1S/F4OS/c1-6(2,3,4)5 Key: DUGWRBKBGKTKOX-UHFFFAOYSA-N ;
	SMILES O=S(F)(F)(F)F;
Properties
Chemical formula	SOF4
Molar mass	124.05 g·mol−1
Appearance	colorless gas
Density	1.653−0.0036T (°C) liquid
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
Solubility in water	reaction in water
log P	7.2349−859.58/T−26275/T²
Structure
Molecular shape	distorted trigonal bipyramid
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H310, H314, H330
Precautionary statements	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; Sulfur hexafluoride; Thiazyl trifluoride; Chromium oxytetrafluoride;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Thionyl tetrafluoride, also known as sulfur tetrafluoride oxide, is an inorganic compound with the formula S O F₄. It is a colorless gas.

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. In the gas-phase, the sulfur-oxygen bond is 1.409 Å. The S−F bond on the axis has length 1.596 Å and the S−F bond on the equator has length 1.539 Å. 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°. Slight variations of bonds lengths and angles has been observed in solid-state by X-ray analysis. The fluorine atoms only produce one NMR line, probably because they exchange positions. It is isoelectronic with phosphorus pentafluoride.