Synthesis and characterization of PdII-methyl complexes with N-heterocyclic carbene-amine ligands

Stefan Warsink; Sandra Y. de Boer; Lianne M. Jongens; Ching-Feng Fu; Shiuh-Tzung Liu; Jwu-Ting Chen; Martin Lutz; Anthony L. Spek; Cornelis J. Elsevier

doi:10.1039/B906817A

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Synthesis and characterization of Pd^II-methyl complexes with N-heterocyclic carbene-amine ligands†

Stefan Warsink,^a Sandra Y. de Boer,^a Lianne M. Jongens,^a Ching-Feng Fu,^b Shiuh-Tzung Liu,^b Jwu-Ting Chen,^b Martin Lutz,^c Anthony L. Spek^c and Cornelis J. Elsevier*^a

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* Corresponding authors

^a University of Amsterdam, van’t Hoff Institute for Molecular Sciences, Nieuwe Achtergracht 166, Amsterdam, The Netherlands
E-mail: c.j.elsevier@uva.nl
Fax: +31 20 525 6456
Tel: +31 20 525 5653

^b Department of Chemistry, National Taiwan Chemistry, Taipei 106, Taiwan

^c Faculty of Science, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands

Abstract

A number of palladium(II) complexes with a heteroditopic NHC-amine ligand and their precursor silver(I) carbene complexes have been efficiently prepared and their structural features have been investigated. The heteroditopic coordination of this ligand class was unequivocally shown by NMR-spectroscopy and X-ray crystallographic analysis. The neutral and cationic cis-methyl-palladium(NHC) complexes are not prone to reductive elimination, which is normally a major degenerative pathway for this type of complex. In contrast, under carbon monoxide atmosphere rapid reductive elimination of the acyl-imidazolium salt was observed.

This article is part of the themed collection: N-heterocyclic carbenes

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Crystal structure data TXT (47K)

Article information

DOI: https://doi.org/10.1039/B906817A
Article type: Paper
Submitted: 06 Apr 2009
Accepted: 08 Jun 2009
First published: 21 Jul 2009

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Dalton Trans., 2009, 7080-7086

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Synthesis and characterization of Pd^II-methyl complexes with N-heterocyclic carbene-amine ligands

S. Warsink, S. Y. de Boer, L. M. Jongens, C. Fu, S. Liu, J. Chen, M. Lutz, A. L. Spek and C. J. Elsevier, Dalton Trans., 2009, 7080 DOI: 10.1039/B906817A

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Dalton Transactions