Synthesis, Characterization, and Catalytic Activity of Nickel(II) Alkyl Complexes Supported by Pyrrole–Diphosphine Ligands
作者:Gopaladasu T. Venkanna、Swetha Tammineni、Hadi D. Arman、Zachary J. Tonzetich
DOI:10.1021/om400630q
日期:2013.8.26
of [NiCl(P2CyPyr)] with LiHBEt3 or by reaction of H(P2RPyr) with [Ni(COD)2] (COD = 1,4-cyclooctadiene). Reactions of the methyl and hydride complexes with CO and CO2, respectively, evince clean migratory insertion chemistry of the Ni–C and Ni–H bonds. Both the alkyl and chloride complexes are active catalysts for the Kumada coupling of aryl chlorides and aryl or alkyl Grignard reagents at room temperature
基于吡咯的钳形配体 (P 2 R Pyr) - (P 2 R Pyr = 2,5-(R 2 PCH 2 ) 2 C 4 H 2 N, R = Ph, Cy)的有机金属 Ni(II) 化学被报道。格氏试剂与 [NiCl(P 2 R Pyr)] 反应生成各种烷基和芳基配合物(甲基、乙基、苄基、苯基和烯丙基),它们都显示出关于镍的方形平面几何形状。氢化物配合物 [NiH(P 2 Cy Pyr)] 也可以通过 [NiCl(P 2 Cy Pyr)] 与 LiHBEt 3 处理或通过 H(P2 R Pyr) 与 [Ni(COD) 2 ](COD = 1,4-环辛二烯)。甲基和氢化物配合物分别与 CO 和 CO 2 的反应表明 Ni-C 和 Ni-H 键具有清洁的迁移插入化学。烷基和氯化物配合物都是在室温下芳基氯化物和芳基或烷基格氏试剂的熊田偶联反应的活性催化剂。报道了几种配合物的固态结构。