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Issue 4, 2019
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A low-valent dinuclear ruthenium diazadiene complex catalyzes the oxidation of dihydrogen and reversible hydrogenation of quinones

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Abstract

The dinuclear ruthenium complex [Ru2H(μ-H)(Me2dad)(dbcot)2] contains a 1,4-dimethyl-diazabuta-1,3-diene (Me2dad) as a non-innocent bridging ligand between the metal centers to give a [Ru2(Me2dad)] core. In addition, each ruthenium is bound to one dibenzo[a,e]cyclooctatetraene (dbcot) ligand. This Ru dimer converts H2 to protons and electrons. It also catalyzes reversibly under mild conditions the selective hydrogenation of vitamins K2 and K3 to their corresponding hydroquinone equivalents without affecting the C[double bond, length as m-dash]C double bonds. Mechanistic studies suggest that the [Ru2(Me2dad)] moiety, like hydrogenases, reacts with H2 and releases electrons and protons stepwise.

Graphical abstract: A low-valent dinuclear ruthenium diazadiene complex catalyzes the oxidation of dihydrogen and reversible hydrogenation of quinones

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Publication details

The article was received on 28 Jun 2018, accepted on 01 Nov 2018 and first published on 15 Nov 2018


Article type: Edge Article
DOI: 10.1039/C8SC02864H
Citation: Chem. Sci., 2019,10, 1117-1125
  • Open access: Creative Commons BY-NC license
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    A low-valent dinuclear ruthenium diazadiene complex catalyzes the oxidation of dihydrogen and reversible hydrogenation of quinones

    X. Yang, T. L. Gianetti, M. D. Wörle, N. P. van Leest, B. de Bruin and H. Grützmacher, Chem. Sci., 2019, 10, 1117
    DOI: 10.1039/C8SC02864H

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