经烷基化、甲酰化、Schiff碱缩合反应,制得水杨醛亚胺配体(3),其Na盐与trans—[NiCl(Ph)(PPh3)2]反应合成了中性镍配合物(4){[[O-(-3-Cyclohexanyl)(5-CH3)C6H2-orthoC(H)=N-2,6-C6H3(i-Pr)2]Ni(Ph3P)(Ph)]2-CH2},以GC-MS,^1H NMR对中间产物及配合物进行了表征.在Al(i-Bu)3的助催化作用下,配合物(4)能有效催化MMA聚合.考察了温度、时间、Al/Cat(4)和MMA/Cat(4)等对聚合反应的影响.在Al/Cat(4)为10,聚合温度为60℃,聚合时间为15h,MMA/Cat(4)为1000的条件下,催化MMA聚合的单体转化率为69.9%,所得PMMA的相对分子质量分布为2.02.
Substituted salicyladimine ligand (3) was prepared by alkylation, formulation and condensation, it's sodlumsalt reacted with trans-[NiCl(Ph)(PPh3 )2] giving the neutral nickel( Ⅱ ) complex(4) {[[O- (3-Cy-clohexanyl) (5 CH3 )C6 H2 -ortho-C (H) = N-2,6-C6 H3- (i Pr)2 ] Ni ( Ph3 P) ( Ph )]2CH2 }. All intermediates and neutral complex (4) were characterized by GC-MS,^1H NMR. The complex(4) activated by AI(i-Bu)3 can catalyze MMA polymerization effectively. The effect of polymerization parameters, such as temperature, time, molar ratios of Al/Cat (4), and MMA/Cat(4) were studied in detail. At the polymerization conditions: Al/Cat(4)= 10; MMA/Cat(4)= 10003 60 ℃ ; 15 h, the conversion of MMA reached 69.9%, and the polydispersity of PMMA was 2.02.