Comprehensive Study of the Reactions Between Chelating Phosphines and Ni(cod)2

作者：Andrew L. Clevenger, Ryan M. Stolley, Nicholas D. Staudaher, Noman Al, Arnold L. Rheingold, Ryan T. VanderLinden, Janis Louie · 发表于：Organometallics · 年份：2018 · DOI：10.1021/acs.organomet.8b00438 · 被引用次数：48 · 研究领域：Asymmetric Hydrogenation and Catalysis、Organometallic Complex Synthesis and Catalysis、Coordination Chemistry and Organometallics

A comprehensive study of the reactions of chelating phosphines with Ni(cod) 2 to form (phosphine)Ni(cod), (phosphine) 2 Ni, or mixtures thereof is presented. A series of (phosphine)Ni(cod) complexes were isolated and characterized. The structural differences between the (phosphine)Ni(cod) and (phosphine) 2 Ni complexes were examined using X-ray crystallography and 1 H and 31 P NMR spectroscopy. In addition, the effects of ring size, rigidity, and bulk of the phosphine backbone on the formation of either (phosphine)Ni(cod) or (phosphine) 2 Ni were investigated. These studies show that the Ni–P bond lengths in both the (phosphine)Ni(cod) and (phosphine) 2 Ni complexes and the size of the ring formed by the chelating phosphine and Ni are crucial in determining whether or not (phosphine)Ni(cod) complexes can be isolated. Other factors such as π-stacking interactions were found to have marginal influence.