Metal Complexes of Macrocyclic Schiff-Base Ligand: Preparation, Characterisation, and Biological Activity

Table 3

Magnetic moment and UV-Vis spectral data in DMF solutions.

Compound	μ eff (BM)	Band position (λ nm)	Extinction coefficient 𝜀max (dm^3 mol^−1cm^−1)	Assignments
Na4L		295	920	𝜋→𝜋^∗
		322	850	CT
[Mn^II4(L)]Cl4	5.11	267	640	𝜋→𝜋^∗
		318	530	CT
		423	360	^6A1g→^4T1g
[Co^II4(L)]Cl4	3.40	278	860	𝜋→𝜋^∗
		343	432	CT
		461	123	^4T1g^(F)→^4T1g^(P)
[Ni^II4(L)]Cl4	0.02	271	758	𝜋→𝜋^∗
		316	410	CT
		664	87	^1A1g→^1A2g
[Cu^II4(L)]Cl4	1.51	283	323	𝜋→𝜋^∗
		303	212	CT
		462	103	^2B1g→^2Eg
[Zn^II4(L)]Cl4	Diamagnetic	291	574	𝜋→𝜋^∗
		311	1235	CT