Abstract: A new dinuclear copper(II) complex [Cu(pht)_2(ba)_2]_2 was synthesized using 5,5-diphenylimidazoline-2,4-dione, benzylamine and copper acetate as raw materials. The complex was characterized by elemental analysis, molar conductance, IR spectrum and single crystal X-ray diffraction. The compound crystallizes in the triclinic system, space group P_1~- with :a=1.0554(15) nm,b=1.2012(17) nm,c=1.4893(2) nm,α=93.24(2) °,β=102.14(2) °,γ=91.79(2) °,V=1.840(5)nm~3,F(000)=814,Z=1,Dc=1.408 g·cm~(-3),μ=0.648 mm~(-1), the final R_1=0.0973 and wR_2=0.1929.Each Cu(II) is a N4O1 coordination environment with the coordination number five and forms a distortional tetragonal pyramid. The complex was valued for its antimicrobial activity against by agar diffusion method in vitro. It was found to be active against the four test bacterial organisms.

Key words: A new dinuclear copper(II) complex [Cu(pht)_2(ba)_2]_2 was synthesized using 5,5-diphenylimidazoline-2,4-dione, benzylamine and copper acetate as raw materials. The complex was characterized by elemental analysis, molar conductance, IR spectrum and single crystal X-ray diffraction. The compound crystallizes in the triclinic system, space group P_1~- with :a=1.0554(15) nm,b=1.2012(17) nm,c=1.4893(2) nm,α=93.24(2) °,β=102.14(2) °,γ=91.79(2) °,V=1.840(5)nm~3,F(000)=814,Z=1,Dc=1.408 g·cm~(-3),μ=0.648 mm~(-1), the final R_1=0.0973 and wR_2=0.1929.Each Cu(II) is a N4O1 coordination environment with the coordination number five and forms a distortional tetragonal pyramid. The complex was valued for its antimicrobial activity against by agar diffusion method in vitro. It was found to be active against the four test bacterial organisms.