The asymmetric unit of the compound I, [CuII(tetren)](NO3)2, contains one [Cu(tetren)]2+ cation (tetren is Tetraethylenepentammine) and two nitrate. In the cation, Cu2+ ion is coordinated by four N atoms from Tetraethylenepentammine and two nitrate ligands in distorted octahedral geometry. In the crystal, the components are linked via N-H...O hydrogen bonds, forming sheets lying parallel to (001). The Metal complex [CuII(tn)2(No3)2], the CuII atom has a distorted octahedral coordination sphere and is coordinated by N atoms of two 1,3-diaminiopropane and two nitrate ligands in the equatorial plane. The asymmetric unit is completed, which are involved in hydrogen bonding with N-H functionalities of the free nitrate groups. The crystal structure also features N-H...O hydrogen bonds formed by the NH2 groups, forming sheets and ribbon lysing parallel to (001) for compound II. Anti-bacterial study reveals that complexes are better anti-microbial agents than three Schiff base due to bacterial cell penetration by chelation.