Synthesis, Reactivity, and Catalytic Application of a Nickel Pincer Hydride Complex
作者:Jan Breitenfeld、Rosario Scopelliti、Xile Hu
DOI:10.1021/om201279j
日期:2012.3.26
with H2, nickel particles, and a five-coordinate Ni(II) complex [(MeN2N)2Ni] (8) as the products. 2 reacted with acetone and ethylene, forming [(MeN2N)Ni-OiPr] (9) and [(MeN2N)Ni-Et] (10), respectively. 2 also reacted with alkyl halides, yielding nickel halide complexes and alkanes. The reduction of alkyl halides was rendered catalytically, using [(MeN2N)Ni-Cl] (1) as catalyst, NaOiPr or NaOMe as
氢化镍(II)配合物[(Me N 2 N)Ni-H](2)是通过[(Me N 2 N)Ni-OMe](6)与Ph 2 SiH 2反应合成的。 NMR和IR光谱以及X射线晶体学。2在溶液中不稳定,并通过两个反应途径分解。第一个途径是分子内NH还原性消除,得到Me N 2 NH和镍颗粒。第二种途径是分子间的,具有H 2,镍颗粒和五配位Ni(II)络合物[(Me N 2N)2 Ni](8)作为产物。2与丙酮和乙烯反应,分别形成[(Me N 2 N)Ni-O i Pr](9)和[(Me N 2 N)Ni-Et](10)。2也与卤代烷反应,生成卤化镍配合物和烷烃。使用[(Me N 2 N)Ni-Cl](1)作为催化剂,NaO i Pr或NaOMe作为碱,Ph 2 SiH 2或Me(EtO)2催化还原卤代烷SiH作为氢化物源。催化作用似乎是通过自由基机理进行的。