Abstract:

A new organic polyamines 1-( N,N-2-aminopropyl) aminoethyl-4-aminopropyl piperazine was synthesized from 1-(2-aminoethyl)piperazine and Acrylonitrile. Based on this polyamines ligand and cobalt perchlorate，[Co(L)HCl](ClO4)2 was synthesized， and purple needle single crystal of this complex. The crystal was characterized by elemental analysis, Molar conductivity and determined by X-ray single crystal diffraction. X-ray data reveals that the titled complex crystallize in the orthorhombic system, space group I4/m, with a = 2.5006(3), b = 2.5006(3), c = 0.85615(11) nm, Mr =594.79，V= 5.3534(10) nm3, Z=8, F(000)= 2488, Dc = 1.476g/cm3, μ(MoKα)= 0.989mm-1，R1 = 0.0666, wR2 = 0.1852 ( I > 2σ( I) ). The complex was tested on antimicrobial activity with agar diffusion antimicrobial test and showed a certain anti-bacteriostatic property to staphylococcus aureus，escherichia coli，bacillus subtilis and Marine Vibrio.

Key words: polyamines, complex, crystal structure, antimicrobial