Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 14, Issue 9, Pages 2719-2729Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200701513
Keywords
chelates; molybdenum; N-heterocyclic carbenes; phosphaferrocenes; ruthenium
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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 spectrom try. 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 sigma-donor with pi-accepting phosphaferrocene moieties. Crystal structures of one ligand precursor and of three complexes have been determined.
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