pH-Dependent isotope exchange and hydrogenation catalysed by water-soluble NiRu complexes as functional models for [NiFe]hydrogenases
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概要
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The pH-dependent hydrogen isotope exchange reaction between gaseous isotopes and medium isotopes and hydrogenation of the carbonyl compounds have been investigated with water-soluble bis(mu-thiolate)(mu-hydride)NiRu complexes, Ni(II)(mu-SR)(2)(mu-H)Ru(II) {(mu-SR)(2) = N,N'-dimethyl-N,N'-bis(2-mercaptoethyl)-1,3-propanediamine}, as functional models for [NiFe]hydrogenases. In acidic media (at pH 4-6), the mu-H ligand of the Ni(II)(mu-SR)(2)(mu-H)Ru(II) complexes has H(+) properties, and the complexes catalyse the hydrogen isotope exchange reaction between gaseous isotopes and medium isotopes. A mechanism of the hydrogen isotope exchange reaction between gaseous isotopes and medium isotopes through a low-valent Ni(I)(mu-SR)(2)Ru(I) complex is proposed. In contrast, in neutral-basic media (at pH 7-10), the mu-H ligand of the Ni(II)(mu-SR)(2)(mu-H)Ru(II) complexes acts as H(-), and the complexes catalyse the hydrogenation of carbonyl compounds.
- 2008-09-21
著者
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Ogo Seiji
Center For Future Chemistry Kyushu University
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Kure Bunsho
Center For Future Chemistry Kyushu University
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MATSUMOTO Takahiro
Center for Future Chemistry, Kyushu University
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Matsumoto Takahiro
Center For Future Chemistry Kyushu University
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Ogo Seiji
Dep. Of Chemistry And Biochemistry Graduate School Of Engineering Kyushu Univ.
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Fukuzumi Shunichi
Dep. Of Material And Life Sci. Graduate School Of Engineering Osaka Univ. Sorst Japan Sci. And Techn
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Fukuzumi Shunichi
Dep. Of Material And Life Sci. Graduate School Of Engineering Osaka Univ. Sorst Japan Sci. And Techn
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