Fluorosulfite
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| Other names
Sulfurofluoridoite
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| FO2S−1 | |
| Molar mass | 83.06 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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
[edit | edit source][((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
[edit | edit source]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
[edit | edit source]Fluorosulfites can react with chlorophosphazenes to make fluorophosphazenes:[6]
- (NPCl2)n + 2n KSO2F → (NPF2)n + 2n KCl + 2nSO2 n=3 or 4
Related
[edit | edit source]Fluorosulfite is in the category of halosulfite ions which include chlorosulfite, bromosulfite and iodosulfite.[7] Related ions include cyanosulfite SO2CN−.[8]
List
[edit | edit source]| 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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