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Sulfur tetrachloride

Sulfur tetrachloride is an inorganic compound with chemical formula SCl4. It has only been obtained as an unstable pale yellow solid. The corresponding SF4 is a stable, useful reagent.

Preparation and structure

It is obtained by treating sulfur dichloride with chlorine at 193 K:

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It melts with simultaneous decomposition above −20 °C.

Its solid structure is uncertain. It is probably the salt SCl3+Cl−, since related salts are known with noncoordinating anions. In contrast to this tetrachloride, SF4 is a neutral molecule.

Reactions

It decomposes above −30 °C (242 K) to sulfur dichloride and chlorine.

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It hydrolyzes readily:

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Sulfur tetrachloride reacts with water, producing hydrogen chloride and sulfur dioxide through the hydrolysis process. Thionyl chloride is an implied intermediate.

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It can be oxidized by nitric acid:

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References

References

  1. Georg Brauer: ''Handbuch der Präparativen Anorganischen Chemie''. {{in lang. de
  2. {{Greenwood&Earnshaw2nd
  3. (1986). "Preparations, Raman spectra, and crystal structures of (SCl3)(SbCl6), (SeCl3)(SbCl6), (SBr1.2Cl1.8)(SbCl6), (TeCl3)(AlCl4) (Triclinic modification), (TeCl3)(SbF6), (TeCl3)(AsF6), and (TeF3)2(SO4)". Inorganic Chemistry.
  4. (2013). "The Solid-State Structure of SF4: The Final Piece of the Puzzle". Angewandte Chemie International Edition.
  5. Holleman-Wiberg, Lehrbuch der Anorganischen Chemie, 101. Auflage, de Gruyter Verlag 1995 {{ISBN. 3-11-012641-9 {{in lang. de
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