Liquid-Phase Dehydrogenation of Methanol with Homogeneous Ruthenium Complex Catalysts
Authors:
- 1 July 1988
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 61 (7) , 2291-2294
Abstract
Catalytic dehydrogenation of methanol proceeded with homogeneous ruthenium(II) complexes, yielding formaldehyde and dihydrogen as primary products under refluxing conditions of the solution. The effects of additives on the initial reaction rate were examined for lithium chloride, lithium acetate, acetic acid and ethyldiphenylphosphine. A catalyst complex, [Ru(OAc)Cl(PEtPh2)3], was deactivated gradually by the displacement of the bidentate OAc ligand with H and CO ligands during the reaction. These cis-disposed sites would be used for splitting the C–H bonds. A catalytic reaction cycle is proposed, in which such processes are included as solvolysis of the catalyst complex, β-H elimination from the OCH3 ligand and attack of acetic acid on the hydride intermediate to generate dihydrogen.Keywords
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