【摘要】 由三齿配体2,6-二[1-(2-甲基苯基亚胺)乙基]吡啶(L1)和2,6-二[(1-苯基亚胺)乙基]吡啶(L2)分别与N iC l2.6H2O在乙腈中反应,合成了两个吡啶二亚胺基氯化镍配合物L1N i(Ⅱ)C l2.CH3CN(1)和L2N i(Ⅱ)C l2(2).通过元素分析、IR和1H NM R对配体和配合物进行了结构表征,并测定了配合物1和2的晶体结构.X射线衍射分析结果表明,两个配合物均为五配位扭曲三角双锥构型,属单斜晶系,Cc空间群.配合物1的晶胞参数a=2.578 3(5)nm,b=1.484 3(3)nm,c=1.586 6(3)nm;β=122.82(3),°V=5.102 4(18)nm3,Z=4,R1=0.070 8,配合物2的晶胞参数a=1.577 2(1)nm,b=0.859 4(1)nm,c=1.545 9(1)nm;β=103.27(1),°V=2.039(2)nm3,Z=4,R1=0.037 5.配合物1和2经M AO活化后对乙烯聚合表现出较低的催化活性.更多还原

【Abstract】 Reactions of equimolar ratios of NiCl₂·6H₂O to the tridentate ligands 2,6-bis[1-（2-methyl-phenylimino）ethyl]pyridine（L¹） or 2,6-bis[（1-phenylimino）ethyl]pyridine（L²） in acetonitrile afford the five-coordinated complexes NiCl₂L¹·CH₃CN（1） and [NiCl₂L²·CH₃CN]（2）, respectively. All ligands and complexes were characterized by using elemental analysis, IR and （）¹H NMR spectroscopy. The structures of complexes 1 and 2 were determined by single-crystal X-ray diffraction. Crystallographic studies on complexes 1 and 2 reveal both complexes to be pentacoordinated with geometries that can be best described as distorted trigonal bipyramidal. Complex 1 crystallizes in the monoclinic system, space group Cc, with -{a=-}2.578 3（5） nm, b=1.484 3（3） nm, c=1.586 6（3） nm; β=122.82（3）°, V=5.102 4（18） nm³, -{Z=4-}, R₁=0.070 8. Complex 2 belongs to monoclinic system with space group Cc, a=1.577 2（1） nm, -{b=-}0.859 4（1） nm, c=1.545 9（1） nm; β=103.27（1）°, （V=2.039 4（2） nm³,） Z=4, R₁=0.037 5. Complexes 1 and 2 exhibit lower catalytic activities for ethylene polymerization upon activation with MAO.更多还原