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Hexakis(PCP-platinum and -ruthenium) complexes by the transcyclometalation reaction and their use in catalysis

Dijkstra, Harm P. and Albrecht, Martin and Medici, Serenella and Klink, Gerard P. M. van and Koten, Gerard van (2002) Hexakis(PCP-platinum and -ruthenium) complexes by the transcyclometalation reaction and their use in catalysis. Advanced Synthesis & Catalysis, Vol. 344 (10), p. 1135-1141. eISSN 1615-4169. Article.

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DOI: 10.1002/1615-4169(200212)344:10<1135::AID-ADSC1135>3.0.CO;2-9

Abstract

Hexakis(PCP-pincer) complexes [C6{PtBr(PCP)}6] (5d) and [C6{RuCl(PCP)(PPh3)}6] (5e) were synthesized via the transcyclometalation (TCM) procedure. Mixing the hexakis(PCHP-arene) ligand 7 with six equivalents of [PtBr(NCN)] (1a) or [RuCl(NCN)(PPh3)] (1b), respectively, resulted in the selective metalation of all PCP-ligand sites and the concomitant formation of six equivalents of the NCHN-arene ligand. This procedure was found to be superior over existing metalation procedures. In addition, hexakisruthenium complex 5e was applied as homogeneous catalyst in the hydrogen transfer reactions of cyclohexanone, acetophenone and benzophenone to the corresponding alcohols. In these reactions, the activity per ruthenium center of 5e was found to be of the same order of magnitude as that of the mononuclear analogue [RuCl(PCP)(PPh3)] 3b, indicating that all ruthenium centers act as independent catalytic sites.

Item Type:Article
ID Code:5236
Status:Published
Refereed:Yes
Uncontrolled Keywords:Homogeneous catalysis, multimetallic complexes, platinum, P ligands, transcyclometalation, ruthenium
Subjects:Area 03 - Scienze chimiche > CHIM/04 Chimica industriale
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Wiley
eISSN:1615-4169
Deposited On:13 Dec 2010 16:36

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