European Journal of Inorganic Chemistry · 2009 · 92 citations · 52 references
Natural SciencesChemistryInorganic ChemistryOrganic ChemistryOrganometallic ChemistryCarbene ComplexesCoordination ChemistryHeterocyclic ChemistryLigand BindingBuried Volume AnalysisCleavageLigand Effects On ReactivityPercent Buried VolumeSteric Effects In Carbene LigandsSubstituent Steric Parameters
Abstract Complexes of palladium bearing NHC ligands (NHC=N‐heterocyclic carbene) were synthesized and fully characterized. The [Pd(NHC)(allyl)Cl] series was obtained by simple cleavage of [Pd(allyl)Cl] 2 by using either the isolated free NHC or the in situ generated NHC. The NHC ligand sterics were varied by introduction of groups attached to the C4–C5 carbon atoms of the NHC backbone. Results of the X‐ray diffraction study permitted determination of the NHC steric parameters within this series. It was observed that the NHC backbone induces variations in its percent buried volume (% V bur ) as a function of the N‐substituents.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
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Imidazolylidenes, imidazolinylidenes and imidazolidines
Anthony J. Arduengo, R. Krafczyk, Reinhard Schmutzler et al. · Tetrahedron · 1999 · 945 citations