Thermal, Spectral, Fluorescence, and Antimicrobial Studies of Cobalt, Nickel, Copper, and Zinc Complexes Derived from 4-[(5-Bromo-thiophen-2-ylmethylene)-amino]-3-mercapto-6-methyl-5-oxo-[1,2,4]triazine

Table 3

Electronic spectra, magnetic data, and ligand field parameters of metal complexes.

Compound	Transitions (cm^-1)			Dq cm^-1	𝐵 cm^-1	𝜈2/𝜈1	𝛽	𝛽%	𝜇eff (BM)
	𝜈1	𝜈2	𝜈3
Co(L)(OAc)·3H2O	12004	25348^*	22779	1334.4	807.6	2.11	0.831	16.9	4.13
Co(L)2·2H2O	11560	24431^*	22258	1287.1	800.6	2.11	0.824	17.6	4.20
Ni(L)(OAc)·3H2O	11261	16200	26115	1126.1	568.8	1.43	0.546	45.4	3.78
Ni(L)2·2H2O	11376	16345	26238	1137.6	563.6	1.43	0.541	45.9	3.76
Cu(L)(OAc)·H2O	20123			—	—	—	—	—	1.75
Cu(L)2	19998			—	—	—	—	—	1.75

^*Calculated value.