经烷基化、甲酰化、Schiff碱缩合反应,制得两种水杨醛亚胺配体(7)和(8),并与trans-[NiCl(Ph)(PPh3)2]反应合成了两种中性镍配合物:(9){[O-(3-Cyclohexanyl)(5-CH3)C6H2-ortho-C(H)=N-2,6-C6H3(i-Pr)2]Ni(Ph3P)(Ph)]2CH2}和(10){[[O-(3-Cyclohexanyl)(5-Cl)C6H2-ortho-C(H)=N-2,6-C6H3(i-Pr)2]Ni(Ph3P)(Ph)]2CH2},以GC-MS,^1H NMR对中间产物及配合物进行了表征.在Ni(COD)2的助催化作用下,配合物(9)和(10)能有效催化乙烯聚合.在8.0×10^5Pa的压力下,配合物(9)的最高活性可达5.34×10^5g/(mol·h),聚乙烯相对分子质量和相对分子质量分布分别为5.26×10^4和2.39.配合物(10)的最高活性可达5.74×10^5g/(mol·h),聚乙烯相对分子质量和相对分子质量分布分别为8.61×10^4和2.81.
Two substituted salicyladimine ligands(7) and (8) were prepared by alkylation, formulation and condensation, which reacted with trans2[NiCl(Ph)(PPh3 )2] to give the neutral nickel( Ⅱ ) com-plex (9) { [-[-O-(3-Cy-clohexanyl) (5-CH3)C6 H2-ortho-C(H) = N-2,6-C6 H3 (i-Pr) 2 ]Ni(Ph3P) (Ph)]2CH2 } and complex (10) { [[-O-(3-Cyclohexanyl) (5-C1) C6 H2-ortho-C( H ) = N-2,6-C6 H3 (i-Pr)2 ] Ni (Ph3P) (Ph)]2CH2 }. All intermediates and complexes (9) and (10) were characterized by GC-MS, ^1H NMR. The two complexes (9) and (10) activated by Ni(COD)2 can catalyze ethylene polymerization effectively. At 8.0× 10^5 Pa, the polymerization activity of complex (9) reaches 5.34× 10^5g/(mol·h), the average molecular weight of viscosity (Mη) and its distribution are 5.26 × 10^4 and 2.39 respectively. The polymerization activity of complex(10) reaches 5.74 × 10^5g/(mol·h), the average molecular weight of viscosity (Mη) and its distri- bution are 8.61 × 10^4 and 2.81 respectively.