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Hybrid Ligands with N‐Heterocyclic Carbene and Chiral Phosphaferrocene Components
Author(s) -
Willms Holger,
Frank Walter,
Ganter Christian
Publication year - 2008
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200701513
Subject(s) - carbene , chemistry , methylene , ruthenium , ligand (biochemistry) , alkyl , ethylene , chelation , molybdenum , stereochemistry , crystal structure , proton nmr , combinatorial chemistry , medicinal chemistry , crystallography , organic chemistry , catalysis , biochemistry , receptor
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.