• Source: Thionyl tetrafluoride

Thionyl tetrafluoride, also known as sulfur tetrafluoride oxide, is an inorganic compound with the formula SOF4. 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. 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°. The fluorine atoms only produce one NMR line, probably because they exchange positions. It is isoelectronic with phosphorus pentafluoride.




Formation


Thionyl fluoride reacting with fluorine gas can produce thionyl tetrafluoride. This was how the gas was first discovered by Moissan and Lebeau in 1902. They identified the formula by the pressure changes resulting from the reaction. Silver fluoride and platinum are capable of catalyzing the reaction.
It can also be formed the reaction of silver difluoride with thionyl fluoride at 392 °F (200 °C), or by electrolyzing hydrogen fluoride with a solution of sulfur dioxide, which also made oxygen difluoride and sulfuryl fluoride. Thionyl chloride or thionyl fluoride electrolyzed with hydrogen fluoride produced even more of the gas.




Reactions


Thionyl tetrafluoride reacts with water to make hydrofluoric acid, sulfurofluoridic acid, and sulfuryl difluoride. Mercury can strip off fluoride to make thionyl fluoride and mercurous fluoride. Strong bases result in formation of fluoride and fluorosulfate ions.




= Click chemistry

=
Thionyl tetrafluoride can be used in click chemistry through reactions with primary amines known as sulfur(VI) fluoride exchange (SuFEx). This kind of reaction was the first "click" reaction to generate a three-dimensional core.




References

Kata Kunci Pencarian:

• Kamus rumus kimia
• Thionyl tetrafluoride
• Tetrafluoride
• Xenon tetrafluoride
• Thionyl fluoride
• Sulfur tetrafluoride
• Hafnium tetrafluoride
• Carbon tetrafluoride
• Silicon tetrafluoride
• Pentafluorosulfur hypofluorite
• List of gases