been elucidated by investigating the reactions of such complexes with aliphatic unsaturated compounds like olefins and alkynes. We have shown that the double or triple bond, respectively, inserts into the nickel–carbon bond followed by β-hydride elimination resulting in aryl-substituted olefins and allenes, which have been identified by means of GC/MS. The remaining nickel forms a bis(N,O-chelate ligand)nickel
包含 N,O-螯合
配体的方形平面
芳烃-(
三苯基膦)
镍 (II) 配合物 (3) 是
一氧化碳/
乙烯共聚反应的催化剂。通过研究此类配合物与脂肪族不饱和化合物(如烯烃和
炔烃)的反应,阐明了催化剂失活的途径。我们已经表明,双键或三键分别插入
镍-碳键,然后β-
氢化物消除,产生芳基取代的烯烃和
丙二烯,这些已通过 GC/MS 进行鉴定。剩余的
镍形成双(N,O-螯合
配体)
镍络合物,其晶体结构已确定。
镍原子由两个
配体以方形平面方式配位。