Английская Википедия:Fluorosulfite

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Fluorosulfite is an ion with the formula SO2F. The term is also used for compounds or salts containing this group. Fluorosulfite was discovered in 1953 by F Seel and H Meier.[1]

Organic compounds with the name "fluorosulfite" contain the group -OS(O)F.[2]

Preparation

[((CH3)2N)3SO][SO2F] can be prepared from OSF4 and Me3SiNMe2.[3] Alkali metal fluorosulfites can be made by soaking the metal fluoride in liquid sulfur dioxide for a few days.[4] β-CsSO2F converts to α-CsSO2F when heated to 110 °C for a couple of days but remains stable below 50 °C.[4]

Properties

The fluorosulfite ion is tetrahedral, with sulfur at the top. The oxygen to sulfur bonds are 147.8 pm and the fluorine to sulfur bond is >169.0 pm long.[4] In solid ionic fluorosulfites, the ion is not fixed in orientation and continuously turns around resulting in dynamic disorder. At room temperature this turning rate is from 2×105 to 107 Hz. When cooled the rate of rotation slows, and can be frozen in place, resulting in static disorder.[4]

Fluorosulfite is isoelectronic with chloryl fluoride (ClO2F) and in compounds it resembles chlorate (ClO3).[4]

The heat of formation from fluoride (F) and sulfur dioxide (SO2) is 50 kcal mol−1.[5]

Reactions

Fluorosulfites can react with chlorophosphazenes to make fluorophosphazenes:[6]

(NPCl2)n + 2n KSO2F (NPF2)n + 2n KCl + 2nSO2 n=3 or 4

Related

Fluorosulfite is in the category of halosulfite ions which include chlorosulfite, bromosulfite and iodosulfite.[7] Related ions include cyanosulfite SO2CN.[8]

List

name formula weight system space group unit cell volume density properties ref
NO[SO2F] [1]
2-chloro-1,3-diisopropyl-4,5-dimethylimidazolium fluorosulfite C11H20FClN2O2S [9]
2-fluoro-1,3-diisopropyl-4,5-dimethylimidazolium fluorosulfite C11H20F2N2O2S P21/c a=15.097 b=13.406 c=15.776 β=113.54 Z=8 2927 [9]
(difluoromethyl)triphenylphosphonium fluorosulfite [Ph3PCF2H][SO2F] white, melt ~240 °C [10]
tetramethylammonium fluorosulfite [(CH3)4N][SO2F] 157.21 orthorhombic Pbca a=11.520 b=11.505 c=11.627 Z=8 1541.0 1.355 [3]
tris-dimethylamino sulfonium fluorosulfite [((CH3)2N)3S][SO2F] 247.35 orthorhombic Pnma a=14.690 b=11.174 c=7.3340 Z=4 1203.8 1.365 [3]
tris-dimethylamino sulfoxonium fluorosulfite [((CH3)2N)3SO][SO2F] 263.65 orthorhombic Pna21 a=21.850 b=6.733 c=8.194 Z=4 1205.5 1.451 [3]
potassium fluorosulfite KSO2F 122.16 monoclinic P21/m a=6.9725 b=5.6713 c=4.6653 β=107.702° Z=2 175.75 2.308 [4]
rubidium fluorosulfite RbSO2F monoclinic P21/m a=7.175 b=5.859 c=4.8416 β=107.18° Z=2 194.45 2.878 [4]
alpha caesium fluorosulfite α-CsSO2F orthorhombic Pnma a=7.9098 b=6.6607 c=7.9893 z=4 420.91 3.408 [4]
beta caesium fluorosulfite β-CsSO2F rhombohedral R3m a=6.5922 c=8.0050 z=3 301.27 3.571 [4]

References

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