Evaluation of DNA Binding, Cleavage, and Cytotoxic Activity of Cu(II), Co(II), and Ni(II) Schiff Base Complexes of 1-Phenylindoline-2,3-dione with Isonicotinohydrazide

Table 3

Electronic spectral parameters and magnetic moment with suggested geometry of the complexes.

Compound	𝜋→𝜋^∗; (cm^−1)	𝑛→𝜋^∗; (cm^−1)	LMCT	d-d band	Assignment	Suggested structure	𝜇eff; (B.M)
L	36764	29239
L–Cu	35971	29069	22026	12345	^2B1g→^2B2g, Eg	Distorted octahedral	4.52
L–Co	36231	29068	—	16339, 14836	^4T1g(F)→^4T1g(P)	Octahedral	4.13
L–Ni	36496	29069	22132	—	^3A2g→^3T1g (F)	Octahedral	3.91