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|Section2= |Section3= |Section7= |Section8= }} Disulfur dichloride is the chemical compound of sulfur and chlorine with the formula S2Cl2 〔Holleman, A. F.; Wiberg, E. ''Inorganic Chemistry'' Academic Press: San Diego, 2001. ISBN 0-12-352651-5.〕〔R. J. Cremlyn ''An Introduction to Organosulfur Chemistry'' John Wiley and Sons: Chichester (1996). ISBN 0-471-95512-4〕 Some alternative names for this compound are ''sulfur monochloride'' (the name implied by its empirical formula, SCl), ''disulphur dichloride'' (British English Spelling) and ''sulphur monochloride'' (British English Spelling). S2Cl2 has the structure implied by the formula Cl-S-S-Cl, wherein the angle between the Cla-S-S and S-S-Clb planes is 90°. This structure is referred to as gauche, and is akin to that for H2O2. A different isomer of S2Cl2 is S=SCl2; this isomer forms transiently when S2Cl2 is exposed to UV-radiation (see thiosulfoxides). ==Synthesis, basic properties, reactions== Pure disulfur dichloride is a yellow liquid that smokes in air due to reaction with water: ::2 S2Cl2 + 2 H2O → SO2 + 4 HCl + 3/8 S8 It is synthesized by partial chlorination of elemental sulfur. The reaction takes place at usable rates at room temperature. In the laboratory, chlorine gas is led into a flask containing elemental sulfur. As disulfur dichloride is formed, the contents become a golden yellow liquid:〔F. Fehér "Dichlorodisulfane" in ''Handbook of Preparative Inorganic Chemistry'', 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 371.〕 ::S8 + 4 Cl2 → 4 S2Cl2 ''ΔH'' = −58.2 kJ/mol Excess chlorine gives sulfur dichloride which causes the liquid to become less yellow and more orange-red: ::S2Cl2 + Cl2 ↔ 2 SCl2 ''ΔH'' = −40.6 kJ/mol The reaction is reversible, and upon standing, SCl2 releases chlorine to revert to the disulfur dichloride. Disulfur dichloride has the ability to dissolve large quantities of sulfur, which reflects in part the formation of polysulfanes: ::S2Cl2 + n S → S2+nCl2 Pure disulfur dichloride is obtained by distilling the yellow-orange liquid over excess elemental sulfur. S2Cl2 also arises from the chlorination of CS2 as in the synthesis of thiophosgene. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Disulfur dichloride」の詳細全文を読む スポンサード リンク
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