Nickel(Ⅱ) Complexes Bearing NH2CH2CH2CH2NH2 and o-C6H4(NH2)2 Ligands:Synthesis, Structures and Their Ethylene Polymeriza
Two nickel complexes [Ni(NH2CH2CH2CH2NH2)3]Cl2 (1) and [Ni(C6H4N2H4)2Cl2] (2) have been obtained and characterized by IR and single crystal X-ray diffraction analysis. In complex 1, the nickel atom was in a chiral pseudo-octahedral [NiN6] geometry environment, which was coordinated by three 1,3-propylenediamine to form three six-membered rings. However in complex 2, besides connected with two o-phenylenediarnine through four Ni-N bonds to form two five-membered rings, the nickel center was coordinated by two Cl to form trans-Ni-Cl2, which was different from general reported diimine nickel complexes. Activated with MAO, MMAO or Et2AlCl, these nickel complexes exhibited considerable good catalytic activity [up to 3.59×106 g·mol-1·h1for complex 2] for ethylene polymerization with main products as dimers or trimers of ethylene.
作 者： LU Xiaoming WANG Zhen LIU Man 作者单位： Department of Chemistry,Capital Normal University,Beijing 100037,China 刊 名： 中国化学（英文版） SCI 英文刊名： CHINESE JOURNAL OF CHEMISTRY 年，卷(期)： 2009 27(2) 分类号： O6 关键词： Nickel complex X-ray crystallography ethylene polymerization