Synthesis, Characterization, and Biological Studies of Binuclear Copper(II) Complexes of (2E)-2-(2-Hydroxy-3-Methoxybenzylidene)-⁴N-Substituted Hydrazinecarbothioamides

Table 1

Analytical data, electronic spectra of ligands, and their metal complexes.

Ligand/; complex	Mol. Wt	Yield	Colour	M.P	Elemental analysis % found (cal)				𝜇eff	𝐴𝑀	Electronic spectral data
		(%)		°C	C	H	N	S	(BM)	(ohm^−1cm^2mol^−1)	Electronic transition	Assignment
𝐋1	226	89.30	White	220	47.87; (47.9)	4.95; (4.92)	18.64; (18.60)	14.29; (14.23)	—	—	—	—
1	650	80.40	Green	194	18.52; (18.47)	1.88; (1.89)	7.16; (7.18)	5.47; (5.48)	0.6302	22	16010; 24027; 32786	d-d transition; Charge transfer; 𝜋→𝜋^∗ band
𝐋2	240	86.00	White	232	50.17; (50.19)	5.437; (5.47)	17.51; (17.55)	13.42; (13.40)	—	—	—	—
2	678	84.00	Light green	180	19.57; (19.59)	2.15; (2.13)	6.86; (6.88)	5.27; (5.23)	0.6902	20	16048; 24367; 32894	d-d transition; Charge transfer; 𝜋→𝜋^∗ band
𝐋3	254	71.20	White	226	52.16; (52.15)	5.976; (5.96)	16.54; (16.58)	12.68; (12.65)	—	—	—	—
3	706	70.30	Light green	170	20.65; (20.61)	2.39; (2.36)	6.58; (6.55)	5.13; (5.00)	0.7026	17	17120; 23640; 32573	d-d transition; Charge transfer; 𝜋→𝜋^∗ band
𝐋4	302	74.80	White	206	59.71; (59.78)	5.019; (5.02)	13.95; (13.94)	10.66; (10.64)	—	—	—	—
4	802	72.58	Light green	168	24.48; (24.44)	2.15; (2.05)	5.63; (5.69)	4.38; (4.35)	0.8315	21	16048; 24367; 32894	d-d transition; Charge transfer; 𝜋→𝜋^∗ band