Metal-Based Biologically Active Compounds: Synthesis, Spectral, and Antimicrobial Studies of Cobalt, Nickel, Copper, and Zinc Complexes of Triazole-Derived Schiff Bases

Table 5

Antibacterial activity of synthesized compounds.

Compound	Diameter of growth of inhibition zone
	(mm)^a
	Staphylococcus aureus	Bacillus subtilis
HL^1	19.0	21.3
Co(L^1)(OAc)·3H2O	23.6	25.6
Co(L^1)2·2H2O	16.6	19.6
Ni(L^1)(OAc)·3H2O	16.3	18.3
Ni(L^1)2·2H2O	14.6	19.6
Cu(L^1)(OAc)·H2O	20.3	18.3
Cu(L^1)2	15.6	17.0
Zn(L^1)(OAc)·3H2O	20.6	23.6
Zn(L^1)2·2H2O	19.3	20.6
HL^2	17.3	18.3
Co(L^2)(OAc)·3H2O	16.6	19.3
Co(L^2)2·2H2O	17.6	20.6
Ni(L^2)(OAc)·3H2O	15.6	18.3
Ni(L^2)2·2H2O	15.0	16.6
Cu(L^2)(OAc)·H2O	16.3	18.5
Cu(L^2)2	19.6	21.2
Zn(L^2)(OAc)·3H2O	20.3	21.6
Zn(L^2)2·2H2O	18.3	19.6
Ciprofloxacin	26.6	24.0

^aValues, including diameter of the well (8 mm), are means of three replicates.