Willms Holger, Frank Walter, Ganter Christian
Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany.
Chemistry. 2008;14(9):2719-29. doi: 10.1002/chem.200701513.
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 sigma-donor with pi-accepting phosphaferrocene moieties. Crystal structures of one ligand precursor and of three complexes have been determined.
已制备出具有一个或两个3,4-二甲基磷酰二茂铁取代基以及亚甲基或亚乙基烷基桥的N-杂环卡宾（NHCs）。结果表明这些卡宾非常稳定，并通过核磁共振方法以及部分通过质谱进行了表征。对它们的钼和钌配合物进行了研究，以确定这些手性PC-和PCP-螯合配体的电子性质和配位行为，这些配体将作为强σ供体的NHC单元与具有π接受性的磷酰二茂铁部分结合在一起。已确定了一种配体前体和三种配合物的晶体结构。
