Disulfur difluoride

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Disulfur difluoride
Disulfur-difluoride-2D-dimensions.png
Disulfur-difluoride-3D-balls.png Disulfur-difluoride-3D-vdW.png
Identifiers
CAS number 13709-35-8
PubChem 123323
ChemSpider 109926
Jmol-3D images Image 1
Properties
Molecular formula S2F2
Molar mass 102.127 g/mol
Related compounds
Related compounds O
2
F
2

S
2
Cl
2

SF
2
Except where noted otherwise, 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[edit]

Disulfur difluoride will undergo intramolecular rearrangement with the existence of alkali elements' fluorides, obtaining the isomer S=SF2:[1]

\rm \ FS-SF \xrightarrow{KF} S=SF_2

Synthesis[edit]

Silver(II) fluoride can fluorinate sulfur in a strictly dry container, and the reaction produces FS-SF:[2]

\rm \ S_8 + 8 AgF_2 \xrightarrow{398K} 4 S_2F_2 + 8 AgF

S=SF2 can be synthesized with the reaction of potassium fluorosulfite and disulfur dichloride:

\rm \ 2 KSO_2F + S_2Cl_2 \rightarrow S=SF_2 + 2 KCl + 2 SO_2[3]

Reactions[edit]

\mathrm{2S_2F_2 \ \xrightarrow{180^oC}\ SF_4 + 3S }
  • Treated with water:
\mathrm{2S_2F_2 + 2H_2O \ \xrightarrow{}\ SO_2 + 3S + 4HF }
\mathrm{S_2F_2 + 3H_2SO_4 \ \xrightarrow{80^oC}\ 5SO_2 + 2HF + 2H_2O }
\mathrm{2S_2F_2 + 6NaOH \ \xrightarrow{}\ Na_2SO_3 + 3S + 4NaF + 3H_2O }
\mathrm{2S_2F_2 + 5O_2 \ \xrightarrow{NO_2}\ SOF_4 + 3SO_3 }[4][5][6]

References[edit]

  1. ^ 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. 
  2. ^ 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. 
  3. ^ 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. 
  4. ^ Справочник химика / Редкол.: Никольский Б.П. и др.. — 3-е изд., испр. — Л.: Химия, 1971. — Т. 2. — 1168 с. (Russian)
  5. ^ Химическая энциклопедия / Редкол.: Кнунянц И.Л. и др.. — М.: Советская энциклопедия, 1995. — Т. 4. — 639 с. — ISBN 5-82270-092-4 (Russian)
  6. ^ 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)