Synthesis, Spectral Characterization, and Biological Activities of Some Metal Complexes Bearing an Unsymmetrical Salen-Type Ligand, (Z)-1-(((2-((E)-(2-Hydroxy-6-methoxybenzylidene)amino)phenyl)amino) methylene) Naphthalen-2(1H)-one

Table 2

Cytotoxicity of H₂L and its metal complexes.

Compound	IC50 (µM)
	KB	Hep-G2
H2L	46.14 ± 3.78	43.29 ± 3.57
[Zn(L).H2O]	>250	>250
[Cu(L)]	>250	>250
[Co(L)]	4.45 ± 0.26	7.40 ± 0.62
[Mn(L)]	4.68 ± 0.65	3.67 ± 0.27
[Fe(L)Cl]	2.64 ± 0.11	6.07 ± 0.44
Ellipticine	1.22 ± 0.20	1.34 ± 0.20