Bond Formation and Coupling between Germyl and Bridging Germylene Ligands in Dinuclear Palladium(I) Complexes
作者:Makoto Tanabe、Shumpei Omine、Naoko Ishikawa、Kohtaro Osakada、Yoshihiro Hayashi、Susumu Kawauchi
DOI:10.1002/anie.201411041
日期:2015.2.23
ligands (PMe3 complexes > tBuNC complexes) are supported by DFT calculations, Wiberg bond indices (WBI), and natural bond orbital (NBO) analyses. Exchanging tBuNC for PMe3 ligands increases the Ge⋅⋅⋅Ge interaction, and simultaneously activates two PdGe bonds. Adding the chelating diphosphine 1,2‐bis(diethylphosphino)ethane (depe) to the PMe3 complexes results in the intramolecular coupling of germyl and
双核钯(I)络合物[L(AR 2 HGE)的Pd(μ-齿轮2)2的Pd(GeHAr 2)L](AR =苯基,对-托尔; L = PME 3,tBuNC)含有末端甲锗烷基和桥接锗烯配体与2.8263(4)(L = PME实验观察到的Ge⋅⋅⋅Ge键长3)和2.928(1)(L =吨BuNC),这是接近最长葛 Ge结合报告给日期[2.714(1)Å]。DFT计算,Wiberg键指数(WBI)和自然键轨道(NBO)分析均支持在亚甲基和胚芽配体之间的重要Ge⋅⋅Ge相互作用(PMe 3络合物> tBuNC络合物)。将tBuNC交换为PMe 3配体提高了Ge⋅⋅⋅Ge相互作用,并同时激活2个的Pd Ge键。将螯合的二膦基1,2-双(二乙基膦基)乙烷(depe)添加到PMe 3络合物中会导致胚芽配体和亚甲基配体的分子内偶联,然后挤出二锗烷。