ИСТИНА

The title complex [Ni(HL)2(L)](OH) was prepd. by (1) adding p-toluenesulfonic acid as catalyst into 0.4 mol/L 2-imidazole formaldehyde/methanol soln., dripping 0.981 g/L benzylamine, reacting for 8 h, removing solvent to obtain N-benzyl-N-[(1E)-1H-imidazole-2-methylene]imine ligand (HL), and (2) dissolving the ligand in methanol to obtain 0.2 mol/L soln. in a three-necked flask, dripping 0.2 mol/L nickel chloride hexahydrate methanol soln., reacting at 80-120° for 8 h under refluxing, cooling to room temp., removing solvent, crystg., cleaning with ethanol/THF (1:2) mixed soln. for 3-5 times, naturally drying. The molar ratio of benzylamine to 2-imidazole formaldehyde is 1:1, the mass ratio of p-toluenesulfonic acid to 2-imidazole formaldehyde is 5:100, the molar ratio of nickel chloride hexahydrate to the ligand is 1:1.1-1.4. The title complex can be used as catalyst for prepg. polyethylene.