Spectroscopic, Thermal, Electrochemical, and Antimicrobial Studies of Mononuclear Manganese(II) Ditolyldithiophosphates

Table 6

Antibacterial activities of the Mn(II) ditolyldithiophosphates (zone of inhibition, in mm).

Compound	Concentration (ppm)	Bacterial species
		Escherichia coli	Klebsiella pneumonia	Pseudomonas aeruginosa
Ciprofloxacin; (standard drug)	50	1.4	2.5	2.6
	100	1.8	2.7	2.9
	150	1.9	2.8	3.0
	200	2.1	2.9	3.5
MnCl2 · 4H2O; (metal salt)	50	2.4	2.6	2.9
	100	2.6	2.8	3.0
	150	2.9	3.0	3.4
	200	3.0	3.1	3.6
Free ligand; (o-CH3C6H4O)2PS2Na	50	0.0	0.0	0.0
	100	0.0	0.0	0.0
	150	0.0	0.0	0.0
	200	0.0	0.0	0.0
(1)	50	1.7	1.7	1.8
	100	1.9	1.9	2.1
	150	2.1	2.1	2.6
	200	2.3	2.5	3.2
(5)	50	1.6	2.1	2.5
	100	1.9	2.3	2.6
	150	2.3	2.5	2.8
	200	2.5	2.8	3.0