disulphur dichloride

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An orange-red liquid, S2Cl2, which is readily hydrolysed by water and is soluble in benzene and ether; r.d. 1.678; m.p. –80°C; b.p. 136°C. It may be prepared by passing chlorine over molten sulphur; in the presence of iodine or metal chlorides sulphur dichloride, SCl2, is also formed. In the vapour phase S2Cl2 molecules have Cl-S-S-Cl chains. The compound is used as a solvent for sulphur and can form higher chlorosulphanes of the type Cl–(S)n–Cl (n < 100), which are of great value in vulcanization processes.

Subjects: Chemistry.

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