Spectroscopic, Thermal, and Antimicrobial Studies of Co(II), Ni(II), Cu(II), and Zn(II) Complexes Derived from Bidentate Ligands Containing N and S Donor Atoms

Table 3

Electronic spectral data (in DMF) 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^1)2·2H2O	10599	22425*	20809	1182.6	762.4	2.11	0.78	22	4.20
Co(L^2)2·2H2O	10913	23063*	20998	1215.0	754.8	2.11	0.77	22	4.11
Ni(L^1)2·2H2O	9907	16226	24372	990.7	725.1	1.63	0.69	31	3.79
Ni(L^2)2·2H2O	9933	16283	23415	993.3	659.9	1.63	0.63	37	3.73
Cu(L^1)2	17981			—	—	—	—	—	1.86
Cu(L^2)2	18121			—	—	—	—	—	1.92

*Calculated value.