Rigid geometry 8-arylimino-7,7-dimethyl-5,6-dihydroquinolyl nickel bromides: single-site active species towards ethylene polymerization
作者:Chuanbing Huang、Youfu Zhang、Tongling Liang、Zhijuan Zhao、Xinquan Hu、Wen-Hua Sun
DOI:10.1039/c6nj02464e
日期:——
to probe the solid state structures of L1, L3 and Ni1–Ni4; this technique provided valuable information regarding the net charge on nickel within the complexes. Upon activation with either methylaluminoxane (MAO) or ethylaluminium sesquichloride (EASC), all nickel complexes exhibited high activities towards ethylene polymerization and produced polyethylene waxes with low molecular weights. The catalytic
制备了稠环杂环酮5,6-二氢-7,7-二甲基喹啉-8-one,并用于合成一系列8-芳基-7,7-二甲基-5,6-二氢喹啉衍生物(芳基= 2,6-Me 2 Ph(L1),2,6-Et 2 Ph(L2),2,4,6-Me 3 Ph(L3),2,6-Et 2 -4-MePh(L4) ,2,6-i-Pr 2 Ph(L5))。的反应L1-L4与(DME)NIBR 2(DME = 1,2-二甲氧基乙烷),得到相应的阳离子双-螯合物,[(Lx的)2 NIBR] [BR](Lx的= L1(Ni1),L2(Ni2),L3(Ni3),L4(Ni4)),为溴化物盐;没有这样的复合物可以用体积最大的L5分离出来。所有新化合物均使用IR光谱,元素分析进行表征,对于L1 - L5则使用1 H和13 C NMR光谱进行表征。此外,Ni1和Ni3的分子结构已经确定,并且它们揭示了基于三角双锥体锥体含镍阳离子电荷并由溴