Disulfur difluoride
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| Names | |||
|---|---|---|---|
| IUPAC name
fluorosulfanyl thiohypofluorite | |||
| Identifiers | |||
| 13709-35-8 | |||
| 3D model (Jmol) | Interactive image | ||
| ChemSpider | 109926 | ||
| PubChem | 123323 | ||
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| Properties | |||
| S2F2 | |||
| Molar mass | 102.127 g/mol | ||
| Related compounds | |||
| Related compounds |
O 2F 2 S 2Cl 2 SF 2 | ||
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
| Infobox references | |||
Disulfur difluoride is a halide of sulfur, with the chemical formula S2F2.
Structure
Disulfur difluoride will undergo intramolecular rearrangement in the presence of alkali elements' fluorides, yielding the isomer S=SF2:[1]
![{\displaystyle {\ce {FS-SF->[{\ce {KF}}]\overbrace {S=SF_{2}} ^{Disulfur\ difluoride}}}}](../I/m/a334fc0dad3414661f62ed05c603dc018ae44800.svg)
Synthesis
Silver(II) fluoride can fluorinate sulfur in a strictly dry container, and the reaction produces FS-SF:[2]
![{\displaystyle {\ce {{S8}+\overbrace {8AgF2} ^{Silver(II)\ fluoride}->[{\ce {398K}}]{4S2F2}+8AgF}}}](../I/m/80c829d30067789422ef88d510b01f5377e12945.svg)
S=SF2 can be synthesized with the reaction of potassium fluorosulfite and disulfur dichloride:
Reactions
- Decomposing to sulfur tetrafluoride and sulfur when heated:
![{\displaystyle {\ce {2S2F2->[{\ce {180^{\circ }C}}]\ \overbrace {SF4} ^{sulfur\ tetrafluoride}+3S}}}](../I/m/1de6bfac321a7397d5b7056aba47996b188ba4b5.svg)
- Treated with water:
- Reacting with sulfuric acid:
![{\displaystyle {\ce {{S2F2}+\overbrace {3H2SO4} ^{sulfuric\ acid}->[{\ce {80^{\circ }C}}]{5SO2}+{2HF}+2H2O}}}](../I/m/1d8c68e0c0c8695bd1176ce79a0937fe6f5cc1e1.svg)
- Reacting with sodium hydroxide:
- Reacting with oxygen at high pressure, using nitrogen dioxide as the catalyst:
![{\displaystyle {\ce {{2S2F2}+5O2->[{\overset {}{\ce {NO_{2}}}}]{SOF4}+3SO3}}}](../I/m/7cae80eeb2b08e96583a4fbcf1f758b6205bc54b.svg)
References
- ↑ Davis, R.Wellington (1986). "The microwave spectrum of the pyramidal isomer of disulfur difluoride: S=SF2". Journal of Molecular Spectroscopy. 116 (2): 371. doi:10.1016/0022-2852(86)90134-7.
- ↑ Davis, R.Wellington; Firth, Steven (1991). "The microwave spectrum of the chain isomer of disulfur difluoride: FS-SF". Journal of Molecular Spectroscopy. 145 (2): 225. doi:10.1016/0022-2852(91)90109-N.
- ↑ 张青莲. 《无机化学丛书》第五卷：氧、硫、硒分族 (in Chinese). Beijing: Science Press. p. 179. ISBN 7-03-002238-6.
- ↑ Справочник химика / Редкол.: Никольский Б.П. и др.. — 3-е изд., испр. — Л.: Химия, 1971. — Т. 2. — 1168 с. (Russian)
- ↑ Химическая энциклопедия / Редкол.: Кнунянц И.Л. и др.. — М.: Советская энциклопедия, 1995. — Т. 4. — 639 с. — ISBN 978-5-85270-092-6 (Russian)
- ↑ Лидин Р.А. и др. Химические свойства неорганических веществ: Учеб. пособие для вузов. — 3-е изд., испр. — М.: Химия, 2000. — 480 с. — ISBN 5-7245-1163-0 (Russian)
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