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Characterization and reactivity of di-μ-chloro-tetrahydridotetrakis(triarylphosphine)diruthenium(III) complexes, Ru2H4Cl2(PR3)4

Authors
Journal
Inorganica Chimica Acta
0020-1693
Publisher
Elsevier
Publication Date
Volume
100
Issue
1
Identifiers
DOI: 10.1016/s0020-1693(00)88293-6
Disciplines
  • Chemistry

Abstract

Abstract The chloride-bridged, dimeric ruthenium(III) complexes [RuH 2Cl(PR 3) 2] 2 (PR 3 = PPh 3, and tri-p-tolylphosphine, Ptol 3) have been isolated by H 2-reduction of the corresponding RuCl 3(PR 3) 2 complexes. The dimers have been fully characterized by spectroscopy, their chemical reactivity and, in the case of the p-tolyl derivative, preliminary X-ray crystallographic data; in a tentative assignment of the hydride ligands, one is considered to be bridging, two are terminal on one Ru, and one is terminal on the other Ru. Kinetic data on the reaction of [RuH 2Cl(Ptol 3) 2] 2 with Ptol 3, which generates RuHCl(Ptol 3) 3 via loss of H 2, suggest the highly reactive intermediate [RuHCl(Ptol 3) 2] 2, the key type of species that probably effects catalytic hydrogenation of olefins using precursor RuHCl(PR 3) 3 complexes.

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