Cluster build-up in aqueous solution: synthesis, structure, protonation and catalytic properties of the trinuclear cation [(η<sup>6</sup>-C<sub>6</sub>H<sub>6</sub>)(η<sup>6</sup>-C<sub>6</sub>Me<sub>6</sub>)<sub>2</sub>Ru<sub>3</sub>(μ<sub>2</sub>-H)<sub>3</sub>(μ<sub>3</sub>-O)]<sup>+</sup>
Author(s)
Faure, Matthieu
Jahncke, Manfred
Neels, Antonia
Stœckli-Evans, Helen
Date issued
August 27, 1999
In
Polyhedron, 1999/18/2679-2685
Subjects
Cluster Trinuclear Ruthenium Arene ligand Oxo cap Aromatic hydrogenation Water-soluble catalyst
Abstract
The trinuclear oxo-capped cluster cation [(η<sup>6</sup>-C<sub>6</sub>H<sub>6</sub>)(η<sup>6</sup>-C<sub>6</sub>Me<sub>6</sub>)<sub>2</sub>Ru<sub>3</sub> (μ<sub>2</sub>-H)<sub>3</sub>(μ<sub>3</sub>-O)]<sup>+</sup> (<b>2</b>) was synthesised by reacting [(η<sup>6</sup>-C<sub>6</sub>Me<sub>6</sub>)Ru(H<sub>2</sub>O)<sub>3</sub>]<sup>2+</sup> with [(η<sup>6</sup>-C<sub>6</sub>Me<sub>6</sub>)<sub>2</sub>Ru<sub>2</sub>(μ<sub>2</sub>-H)<sub>3</sub>]<sup>+</sup> in aqueous solution. The single-crystal X-ray structure analysis of the tetrafluoroborate salt shows the cation to contain a H<sub>2</sub>O molecule hydrogen-bonded to the μ<sub>3</sub>-oxo ligand. Acidification experiments show two protonation steps occuring at this H<sub>2</sub>O molecule and the oxo cap of the triruthenium cluster. The cluster cation <b>2</b> catalyses the hydrogenation of aromatic compounds in aqueous solution under biphasic conditions.
Publication type
journal article
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