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 |
δ
r(H2O) δ w(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 |