PH-Dependent isotope exchange and hydrogenation catalysed by water-soluble NiRu complexes as functional models for [NiFe]hydrogenases

Bunsho Kure, Takahiro Matsumoto, Koji Ichikawa, Shunichi Fukuzumi, Yoshiki Higuchi, Tatsuhiko Yagi, Seiji Ogo

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

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(μ-thiolate)(μ-hydride)NiRu complexes, NiII(μ-SR)2(μ-H)RuII {(μ-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 μ-H ligand of the NiII(μ-SR) 2(μ-H)RuII 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 NiI(μ-SR)2RuI complex is proposed. In contrast, in neutral-basic media (at pH 7-10), the μ-H ligand of the Ni II(μ-SR)2(μ-H)RuII complexes acts as H-, and the complexes catalyse the hydrogenation of carbonyl compounds.

Original languageEnglish
Pages (from-to)4747-4755
Number of pages9
JournalDalton Transactions
Issue number35
DOIs
Publication statusPublished - Sep 1 2008

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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