Disulfur difluoride

Structure

Disulfur difluoride has a chain structure . The angle between the and planes is 87.9°, while the angles of and are equivalent, and are equal to 108.3°. Both bonds are equivalent and their length is 163.5 pm, while the length of the bond is 189 pm. This structure is referred to as gauche, and is similar to .

There is a branched isomer of disulfur difluoride, thiothionyl fluoride, with the structure .

Synthesis

Silver(II) fluoride can fluorinate sulfur in a strictly dry container at 125 C, and the reaction produces :

:

Reactions

Disulfur difluoride undergoes intramolecular rearrangement in the presence of fluorides of alkali metals, yielding the isomer S=SF2:

:

• Decomposing to sulfur tetrafluoride and sulfur when heated to 180 °C: :

• Hydrolysis: :

• Reacting with sulfuric acid at 80 °C: :

• Reacting with sodium hydroxide: :

• Reacting with oxygen at high pressure, using nitrogen dioxide as a catalyst: :

References

References

1. "Difluorodisulfane".
2. (1991). "The microwave spectrum of the chain isomer of disulfur difluoride: FS-SF". Journal of Molecular Spectroscopy.
3. (1986). "The microwave spectrum of the pyramidal isomer of disulfur difluoride: S=SF2". Journal of Molecular Spectroscopy.
4. Справочник химика / Редкол.: Никольский Б.П. и др.. — 3-е изд., испр. — Л.: Химия, 1971. — Т. 2. — 1168 с. {{in lang. ru
5. Химическая энциклопедия / Редкол.: Кнунянц И.Л. и др.. — М.: Советская энциклопедия, 1995. — Т. 4. — 639 с. — {{ISBN. 978-5-85270-092-6 {{in lang. ru
6. Лидин Р.А. и др. Химические свойства неорганических веществ: Учеб. пособие для вузов. — 3-е изд., испр. — М.: Химия, 2000. — 480 с. — {{ISBN. 978-5-7245-1163-6 {{in lang. ru