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

Table 4

Important IR spectral data (cm⁻¹) of the ligands and their metal complexes.

Compound	𝜈(O–H)	𝜈(N–H)/NHR	𝜈(C=N)	𝜈(C=S)	𝜈(M–S)	𝜈(M–N)	𝜈(M–Cl)
𝐋1	3460	3293	1579	820	—	—	—
1	3465	3293	1539	635	374	409	356
𝐋2	3448	3305	1527	831	—	—	—
2	3440	3307	1577	651	379	422	342
𝐋3	3410	3308	1540	815	—	—	—
3	3402	3309	1552	665	382	431	365
𝐋4	3452	3296	1539	815	—	—	—
4	3450	3298	1548	673	384	446	372