Derivatographic Studies on Transition Metal Complexes. VI. Thermal, <I>cis</I>, <I>trans</I>-to-<I>cis</I>, <I>cis</I> Exchange-Isomerization of [CoCl<SUB>2</SUB>(NH<SUB>3</SUB>)<SUB>2</SUB>en]SCN·H<SUB>2</SUB>O in Solid Phase

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概要

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• The exchange-isomerization of the complex, <I>cis</I>(dichloro), <I>trans</I>(diammine)-[CoCl<SUB>2</SUB>(NH<SUB>3</SUB>)<SUB>2</SUB>en]SCN·H<SUB>2</SUB>O to <I>cis</I>(chloro isothiocyanato), <I>cis</I>(diammine)-[CoCl(NCS)(NH<SUB>3</SUB>)<SUB>2</SUB>en]Cl, was investigated by means of both derivatographic and isothermal methods. The reaction took place immediately after the liberation of crystalline water. The thermochemical functions were obtained to be <I>ΔH</I>=(5.5±1.0) kcal/mol and <I>E</I><SUP>≠</SUP>=(22.8±2.0) kcal/mol for the dehydration, while those for the exchange-isomerization were <I>ΔH</I>=(4.8±1.0) kcal/mol and <I>E</I><SUP>≠</SUP>=(62.3±3.0) kcal/mol, respectively. As a probable reaction mechanism for the exchange-isomerization, a certain seven coordinated intermediate in the reaction pathway was introduced.

• 公益社団法人 日本化学会の論文

著者

• SUZUKI Masatatsu

  Department of Chemistry, Faculty of Science, Kanazawa University

• Kyuno Eishin

  Department of Chemistry Faculty of Science Kanazawa University

• Tsuchiya Ryokichi

  Department of Chemistry, Faculty of Science, Kanazawa University

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