当前位置：
X-MOL 学术
›
Organometallics
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Structural Characterization of β-Agostic Bonds in Pd-Catalyzed Polymerization
Organometallics ( IF 2.5 ) Pub Date : 2017-10-23 00:00:00 , DOI: 10.1021/acs.organomet.7b00666 Hongwei Xu 1 , Chunhua Tony Hu 1 , Xiaoping Wang 2 , Tianning Diao 1
Organometallics ( IF 2.5 ) Pub Date : 2017-10-23 00:00:00 , DOI: 10.1021/acs.organomet.7b00666 Hongwei Xu 1 , Chunhua Tony Hu 1 , Xiaoping Wang 2 , Tianning Diao 1
Affiliation
|
β-agostic Pd 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. Short Cα–Cβ distances and acute Pd–Cα–Cβ bond angles combined serve as unambiguous evidence for the β-agostic interaction. Characterization of the agostic structure and the kinetic barrier for β-H elimination offer important insight into the fundamental understanding of agostic bonds and the mechanism of polymerization.
中文翻译：
钯催化聚合中β-声键的结构表征
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。
更新日期：2017-10-23
中文翻译：
钯催化聚合中β-声键的结构表征
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。
京公网安备 11010802027423号