Table 6. IC₅₀ values for complexes 2.75–2.83 and cisplatin against MDA-MB-231 and L-6 cell lines obtained using MTT assay.

Ligand	Metal	Complexes	IC50 (μM)
			MDA-MB-231	L-6
2.72	Ni(ii)	2.75	0.36	0.40
—	—	2.76	59.29	67.48
—	—	2.77	74.65	94.63
2.73	Cu(ii)	2.78	0.34	0.36
—	—	2.79	306.2	386.1
—	—	2.80	12.0	14.17
2.74	Zn(ii)	2.81	512.5	741.2
—	—	2.82	462.1	470.0
—	—	2.83	36.48	47.27
		Cisplatin	91.28	—