A low-valent dinuclear ruthenium diazadiene complex catalyzes the oxidation of dihydrogen and reversible hydrogenation of quinones. Issue 4 (15th November 2018)

• Record Type: Journal Article
• Authors: Yang, Xiuxiu; Gianetti, Thomas L.; Wörle, Michael D.; van Leest, Nicolaas P.; de Bruin, Bas; Grützmacher, Hansjörg
• Is Part Of: Chemical science. Volume 10:Issue 4(2019)
• Page Start: 1117
• Page End: 1125
• Publication Date: 2018-11-15
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8sc02864h
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : Dinuclear ruthenium with similar functional ligands as [Fe, Fe] hydrogenase active sites catalyzes H2 splitting and reversible hydrogenation of vitamin K. Abstract : The dinuclear ruthenium complex [Ru2 H(μ-H)(Me2 dad)(dbcot)2 ] contains a 1, 4-dimethyl-diazabuta-1, 3-diene (Me2 dad) as a non-innocent bridging ligand between the metal centers to give a [Ru2 (Me2 dad)] 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C double bonds. Mechanistic studies suggest that the [Ru2 (Me2 dad)] moiety, like hydrogenases, reacts with H2 and releases electrons and protons stepwise.