Nickelacycles with anionic C–N–N′ terdentate ligands containing (5,5), (5,6), (5,7) and (6,5) membered fused rings. Reaction with ethylene†
作者:Rosa M. Ceder、Guillermo Muller、Matías Ordinas、Miguel A. Maestro、José Mahía、Mercè Font Bardia、Xavier Solans
DOI:10.1039/b008520k
日期:——
or CH3CN as stabilizing ligand. In ionic compounds from monohalogenoaryl substituted ligands the formation of isomers by restricted rotation around the Cphenyl–Cmethinic bond is also observed. The 1H NMR spectra of complexes with (5,5), (5,6), (6,5) fused rings show fluxional behavior, the data being consistent with interconversion of two chelate ring conformations that are associated with the relative
一系列与二席夫碱作为terdentate CNN nickelacycle复合物-阴离子配体已经准备好了。单或二邻卤代芳基取代基上一个C–X键的氧化加成配体,N,N'-二亚苄基链烷-1,2-二胺(乙烷, 丙烷 和丁二胺)和 N,N'-双(1,2-二苯乙叉基)乙烷-1,2-二胺对[Ni(cod)2 ]给出中性络合物[NiX(CNN)],其中包含(5,5),(5,6),(5,7)和(6,5)成员稠合的螯合环(NiCN和NiNN)。单卤代芳基取代的配合物配体以两种非交换构型异构体的混合物形式获得(关于非金属化的E或Z立体化学亚胺团体)。阳离子配合物[NiL(CNN)] BF 4由下式产生卤化物通过使用TlBF 4和2,4,6-Me 3 C 5 H 2 N或CH 3 CN作为稳定剂从这些中性络合物中提取配体。在离子化合物中被单卤代芳基取代配体还观察到通过绕C苯基-C甲基键受限旋转而形成的异构体。这1