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Hybrid Ligands with N-Heterocyclic Carbene and Chiral Phosphaferrocene Components

✍ Scribed by Holger Willms; Walter Frank; Christian Ganter

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 435 KB
Volume: 14
Category: Article
ISSN: 0947-6539
DOI: 10.1002/chem.200701513

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✦ Synopsis

Abstract

N‐Heterocyclic carbenes (NHCs) possessing one or two 3,4‐dimethylphosphaferrocenyl substituents and either methylene or ethylene alkyl bridges have been prepared. These carbenes turned out to be remarkably stable and were characterized by NMR methods and partly by mass spectrometry. Their molybdenum and ruthenium complexes were examined in order to determine the electronic properties and the coordination behaviour of these chiral PC‐ and PCP‐chelate ligands, which combine a NHC unit as a strong σ‐donor with π‐accepting phosphaferrocene moieties. Crystal structures of one ligand precursor and of three complexes have been determined.

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