ChemInform Abstract: Roles of Neutral and Anionic Ruthenium Polyhydrides in the Catalytic Hydrogenation of Ketones and Arenes.
Abstract
Addition of cyclohexanone to the complex (I) results in the formation of cyclohexanol (IV) and the complex (III) in a rate-determining step.
ChemInform Abstract
Addition of cyclohexanone to the complex (I) results in the formation of cyclohexanol (IV) and the complex (III) in a rate-determining step. (III) and H2 regenerate (I). The combination of these reactions constitutes a catalytic cycle for the hydrogenation of cyclohexane. The anion (V) also catalyzes the hydrogenation but this occurs by an induction period during which the catalyst precursor apparently is converted to (I), because it is shown that (V) and (I) coexist through the equilibrium shown. A catalytic cycle analogous to that for cyclohexanone is established for the hydrogenation of 9-methylanthracene. For this substrate also (I) is a more active catalyst than (V).
