Kinetics of structural rearrangement accompanying the substitution reaction on complex (Co(terpy)(hmpa)3)2+(terpy=2,2':6',2"-terpyridine) in hexamethylphosphoric triamide.
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概要
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The reaction of structural rearrangement accompanying the substitution of hexamethylphosphoric triamide (HMPA) for 2,2′: 6′,2″-terpyridine (terpy) from octahedral [Co(terpy)(hmpa)<SUB>3</SUB>]<SUP>2+</SUP> to tetrahedral [Co(hmpa)<SUB>4</SUB>]<SUP>2+</SUP> proceeds through a five-coordinated intermediate in HMPA. The following values for the first-order rate constant at 25 °C, Δ<I>H</I><SUB>d</SUB><SUP>\neweq</SUP>, and Δ<I>S</I><SUB>d</SUB><SUP>\neweq</SUP> were obtained: <I>k</I><SUB>d</SUB>=3.55×10<SUP>−5</SUP> s<SUP>−1</SUP>, Δ<I>H</I><SUB>d</SUB><SUP>\neweq</SUP>=105.4 kJ mol<SUP>−1</SUP> and Δ<I>S</I><SUB>d</SUB><SUP>\neweq</SUP>=+15.9 J K<SUP>−1</SUP> mol<SUP>−1</SUP>.
- 公益社団法人 日本化学会の論文
著者
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Abe Yuriko
Department Of Chemistry Faculty Of Science Nara Women's University
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Wada Goro
Department of Chemistry, Faculty of Science, Nara Women s University
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