Transition Metal(II) Complexes with Cefotaxime-Derived Schiff Base: Synthesis, Characterization, and Antimicrobial Studies

Table 2

Relevant IR data (cm⁻¹) of the ligand and its complexes.

Compound	𝜈(OH)	𝜈(NH2)	𝜈(OH); associate	𝜈(C=O); β-lact	𝜈(C=N); azm.	𝜈(C=O); amide; 𝜈(C=O); ester	𝜈(C–O); phenolic	𝛿𝑟(H2O); 𝛿𝑤(H2O); coord.	𝜈(M–O); 𝜈(M–N)
Cefotaxime-Na	—	3442	—	1776	—	1640	—	—	—
Schiff base (L)	—	—	2800	1770	1657	1645	1274	—	—
[CoL2(H2O)2]	3530	—	—	1770	1624	1640	1295	863; 539	419; 510
[NiL2(H2O)2]	3545	—	—	1770	1623	1640	1305	863; 541	420; 520
[CuL2(H2O)2]	3540	—	—	1770	1620	1645	1295	860; 545	427; 514
[ZnL2(H2O)2]	3543	—	—	1770	1630	1640	1310	857; 545	423; 517