Derivatographic studies on transition metal complexes. XVIII. Thermal isomerization of cis-[CrCl2tn2]Cl 0.5H2O in solid phase.
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概要
- 論文の詳細を見る
The thermal <I>cis</I>-to-<I>trans</I> isomerization of <I>cis</I>-[CrCl<SUB>2</SUB>tn<SUB>2</SUB>]Cl·0.5H<SUB>2</SUB>O in a solid phase was studied by means of derivatographic and isothermal measurements. It was found that <I>cis</I>-[CrCl<SUB>2</SUB>tn<SUB>2</SUB>]Cl·0.5H<SUB>2</SUB>O in which trimethylenediamine(tn) forms six-membered chelate ring with chromium undergoes isomerization to the <I>trans</I>-complex in contrast with the isomerization of <I>trans</I>-[MX<SUB>2</SUB>(diam)<SUB>2</SUB>]X·HX·<I>n</I>H<SUB>2</SUB>O (M=Co or Cr, X=halogen) to the <I>cis</I>-one in which the diamine (diam) forms five-membered chelate ring with metal M. The isomerization proceeded in anhydrous state. The activation energy of the isomerization of the complex was found to be 163 kJ mol<SUP>−1</SUP> from the isothermal measurements, which is fairly greater than that of the <I>trans</I>-[CoCl<SUB>2</SUB>pn<SUB>2</SUB>](H<SUB>5</SUB>O<SUB>2</SUB>)Cl<SUB>2</SUB> and <I>cis</I>-[CoCl<SUB>2</SUB>tn<SUB>2</SUB>]Cl·H<SUB>2</SUB>O. The difference was explained by whether or not water molecule involved as a lattice water contributes to the isomerization.
- 公益社団法人 日本化学会の論文
著者
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Uehara Akira
Department Of Chemistry Faculty Of Science Kanazawa University
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Kyuno Eishin
Department of Chemistry Faculty of Science Kanazawa University
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Tsuchiya Ryokichi
Department of Chemistry, Faculty of Science, Kanazawa University
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Yoshikuni Tadatsugu
Department of Chemistry, Faculty of Science, Kanazawa University
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