作者:Hongwei Xu、Chunhua Tony Hu、Xiaoping Wang、Tianning Diao
DOI:10.1021/acs.organomet.7b00666
日期:2017.11.13
complexes are critical intermediates in catalytic reactions, such as olefin polymerization and Heck reactions. Pd β-agostic complexes, however, have eluded structural characterization, due to the fact that these highly unstable molecules are difficult to isolate. Herein, we report the single-crystal X-ray and neutron diffraction characterization of β-agostic (α-diimine)Pd–ethyl intermediates in polymerization
β-声Pd配合物是催化反应(例如烯烃聚合和Heck反应)中的关键中间体。然而,由于这些高度不稳定的分子难以分离的事实,Pdβ-声波复合物尚无法进行结构表征。在此,我们报道了聚合过程中β-声波(α-二亚胺)Pd-乙基中间体的单晶X射线和中子衍射特性。C短α -C β距离和急性的Pd-C α -C β结合的键角是β-声波相互作用的明确证据。分子结构的表征和β-H消除的动力学障碍为深入理解分子间的键和聚合机理提供了重要的见识。