Studies of Ruthenium Complexes. VIII. Kinetic Studies of the Thermal Substitution Reaction of Hexaammine and <I>cis</I>-Dihalogenotetraammineruthenium(III) Complexes in the Solid State
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概要
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The Kinetics of the thermal substitution reaction of hexaammineruthenium(III) halides and <I>cis</I>-dihalogenotetraammineruthenium(III) halides have been studied in the solid state. The reaction rates and kinetic parameters were determined for these two reactions; [Ru(NH<SUB>3</SUB>)<SUB>6</SUB>]X<SUB>3</SUB>→[RuX(NH<SUB>3</SUB>)<SUB>5</SUB>]X<SUB>2</SUB>+NH<SUB>3</SUB>, (X=Br, I) and <I>cis</I>-[RuX<SUB>2</SUB>(NH<SUB>3</SUB>)<SUB>4</SUB>]X→[RuX<SUB>3</SUB>(NH<SUB>3</SUB>)<SUB>3</SUB>]+NH<SUB>3</SUB>, (X=Cl, Br). The values of the rate constant, the activation energy, and the activation entropy were 2.10×10<SUP>−5</SUP> s<SUP>−1</SUP> (at 161°C), 23.3 kcal mol<SUP>−1</SUP>, and −29.3 e.u. for the hexaammine bromide, and 2.92×10<SUP>−5</SUP>s<SUP>−1</SUP> (at 162 °C), 31.3 kcal mol<SUP>−1</SUP>, and −10.1 e.u. for the <I>cis</I>-dibromotetraammine bromide. The <I>S</I>N2 mechanism is more probable for the former reaction, while the <I>S</I><SUB>N</SUB>1 mechanism is more probable for the latter reaction.
- 公益社団法人 日本化学会の論文
著者
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Kohata Susumu
Department Of Bioengineering Yatsushiro National College Of Technology
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Ohyoshi Akira
Department Of Applied Chemistry Faculty Of Engineering Kumamoto University
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Odate Tomio
Department of Industrial Chemistry, Faculty of Engineering, Kumamoto University
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Hiraki Shunichi
Department of Industrial Chemistry, Faculty of Engineering, Kumamoto University
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Oda Junko
Department of Industrial Chemistry, Faculty of Engineering, Kumamoto University
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