Cu(II) complexes with 4,6-Bis(3,5-dimethyl-1H-pyrazole-1-yl)pyrimidine, 4-(3,5-dimethyl-1H-pyrazole-1-yl)-6(3,5-diphenyl-1H-pyrazole-1-yl)pyrimidine:: Synthesis and catalytic activity in ethylene polymerization reaction

The Cu(II) complexes with 4,6-bis(3,5-dimethyl-]H-pyrazole-1-yl)pyrimidine (0) and 4-(3,5-di dimethyl-1H-pyrazole-1-y1)-6-(3,5-diphenyl-1H-pyrazole-1-yl)pyrimidine (L-2) of the composition (CuLBr4)-Br-1 and Cu-2,L(2)A(4) (A = Cl, Br), respectively, were synthesized and studied by IR and magnetochemical methods. The molecular structure of the complexes is likely to be binuclear. In the presence of cocatalysts methylaluminoxane and triisobutylaluminium, the title complexes exhibit catalytic activity in the ethylene polymerization reaction.