Complexa   Concentration Gram positive bacteria Gram negative bacteria Bacillus cereus Staphylococcus aureus Escherichia coli Klebsiella pneumoniae    (1) 50 µg/ml -ve -ve 4 -ve 100 µg/ml -ve -ve 4 -ve 150 µg/ml -ve -ve 2 -ve   (2) 50 µg/ml -ve -ve 5 -ve 100 µg/ml -ve 3 5 -ve 150 µg/ml -ve 3 4 -ve   (3) 50 µg/ml 1 8 4 -ve 100 µg/ml 1 9 4 -ve 150 µg/ml 1 10 3 -ve   (4) 50 µg/ml -ve -ve 5 -ve 100 µg/ml -ve 5 5 -ve 150 µg/ml 2 5 4 -ve   Penicillin 50 µg/ml 1 2 1 -ve 100 µg/ml 3 2 3 -ve 150 µg/ml 3 2 3 -ve

aNumbers as given in Table 2

Table 6: Antibacterial activity data of Cu(II) complexes. The results were recorded as the diameter of inhibition zone (mm).