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|Section2= |Section3= |Section4= |Section5= |Section6= |Section7= |Section8= }} Thionyl tetrafluoride is an inorganic compound gas with the formula SOF4. It is also known as sulfur tetrafluoride oxide. The shape of the molecule is a distorted trigonal bipyramid. The oxygen is 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°.〔Lise Hedberg and Kenneth Hedberg "Thionyl tetrafluoride. Reanalysis of the molecular structure and resolution of the multiple model problem" ''the Journal of Physical Chemistry'' March 1982 vol 86 page 598 doi 10.1021/j100394a004 ()〕 The fluorine atoms only produce one NMR line, probably because they exchange positions.〔 ==Formation== Thionyl fluoride reacting with fluorine gas can produce thionyl tetrafluoride.〔Harry Julius Emeléus and A.G. Sharpe ''Advances in Inorganic Chemistry Volume 2'' Academic Press 1960 page 117 ()〕 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 by heating sulfur hexafluoride with air to 400°. This can happen when inhaling through a lit cigarette. Or the reaction of silver difluoride with thionyl fluoride at 200 degrees.〔http://pubs.acs.org/doi/abs/10.1021/ja01589a013〕 Another way to form it is by electrolyzing hydrogen fluoride with a solution of sulfur dioxide, which also made oxygen difluoride and sulfuryl fluoride.〔Shunji Nagase Fluorination of Inorganic Sulfur Compounds ''Bulletin of the Chemical Society of Japan'' vol 42 page 2062 1968〕 Also thionyl chloride or thionyl fluoride electrolyzed with hydrogen fluoride produced even more of the gas. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Thionyl tetrafluoride」の詳細全文を読む スポンサード リンク
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