Bidentate monoanionic ligands 2-(benzo[d]thiazol-2-yl) phenol (La), 2-(benzo[d]thiazol-2-yl)-6-methylphenol (Lb), 2-(benzo[d]thiazol-2-yl)-6-tert-butyl-4-methylphenol (Lc), 2-(benzo[d]thiazol-2-yl)-6-chlorophenol (Ld), and 2-(benzo[d]thiazol-2-yl)-4-chlorophenol (Le) have been synthesized. Reactions of TiCl4(THF)2 or ZrCl4 with La–Le afford the corresponding titanium complexes Ti[ON]2RCl2 [R = 6-Me (2b); R = 4-Me-6-But (2c)], and zirconium complexes Zr[ON]2RCl2 [R = H (3a); R = 6-Me (3b); R = 4-Me-6-But (3c); R = 6-Cl (3d); R = 4-Cl (3e)], and Zr[ONR]HCl4·THF [R = 6-Me (4b)], respectively. Complexes 2a–4b were characterized by IR, 1H NMR spectra and elemental analysis. The molecular structures of La, 2b, 2c, 3b, 3c and 4b have been characterized by single-crystal X-ray diffraction analyses. The effect of steric hindrance and the coordination metal on the structure of the products has been investigated. When activated by excess methylaluminoxane (MAO), 2b and 2c, 3a–3e and 4b can be used as catalysts for ethylene polymerization and exhibit moderate to good activities.
双齿单阴离子
配体2-(苯并[d]
噻唑-2-基)
苯酚(La)、2-(苯并[d]
噻唑-2-基)-6-甲基
苯酚(Lb)、2-(苯并[d]
噻唑-2-基)-6-叔丁基-4-甲基
苯酚(Lc)、2-(苯并[d]
噻唑-2-基)-6-
氯苯酚(Ld)和2-(苯并[d]
噻唑-2-基)-4-
氯苯酚(Le)已被合成。TiCl4(THF)2或ZrCl4与La–Le反应生成相应的
钛络合物Ti[ON]2RCl2 [R = 6-甲基(2b);R = 4-甲基-6-叔丁基(2c)],以及
锆络合物Zr[ON]2RCl2 [R = H(3a);R = 6-甲基(3b);R = 4-甲基-6-叔丁基(3c);R = 6-
氯(3d);R = 4-
氯(3e)],以及Zr[ONR]HCl4·THF [R = 6-甲基(4b)]。络合物2a–4b通过红外光谱、1H NMR谱和元素分析进行了表征。络合物La、2b、2c、3b、3c和4b的分子结构通过单晶X射线衍射分析进行了确认。研究了空间阻碍和配位
金属对产物结构的影响。当用过量的甲基铝氧烷(MAO)激活时,2b和2c、3a–3e以及4b可作为聚
乙烯聚合催化剂,展现出中等至良好的活性。