【摘 要】
：
Two types of salicylaldiminato-based nickel complcxes, mono-ligated Ni (Ⅱ) complexes and bis-ligated Ni (Ⅱ) complexes were synthesized and characterized b
【机 构】
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Daqing Petrochemical Research Center of CNPC, Daqing 163714, China
【出 处】
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The 6th Joint China-Japan Chemical Engineering Symposium(第六届
论文部分内容阅读
Two types of salicylaldiminato-based nickel complcxes, mono-ligated Ni (Ⅱ) complexes and bis-ligated Ni (Ⅱ) complexes were synthesized and characterized by FT-IR, NMR, MS and EA.In the presence of methylaluminoxane as cocatalyst, all the nickel complexes exhibited high activities for the polymerization of methyl methacrylate and syndiotactic-rich polymethyl methacrylate was obtained.The complexes with less bulky substituents on salicylaldiminato framework possessed higher activities, while with the same salicylaldiminato, the mono-ligated nickel complexes showed higher catalytic activity than bis-ligatcd ones.
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