Table 2.
IR spectral data of the ligand and its complexes in cm−1.
| Comp. | ν(OH) Water | ν(N-H) | ν(C=N) Azomethine |
ν(C=N) Isoxazole Ring |
ν(C-N) | νs(SO2) νas(SO2) |
ν(Ln-O) | ν(Ln-N) | NO3− Frequencies | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ν4 | ν1 | ν2 | ν6 | ν3 | ν5 | |||||||||
| L | 3462 | 3206 | 1661 | 1611 | 1389 | 1156 1326 |
- | - | ||||||
| L1 | 3461 | 3207 | 1660 | 1588 | 1372 | 1155 1319 |
567 | 430 | 1498 | 1319 | 1030 | 882 | 738 | 694 |
| L2 | 3459 | 3204 | 1658 | 1584 | 1374 | 1155 1312 |
559 | 446 | 1489 | 1306 | 1022 | 879 | 730 | 695 |
| L3 | 3462 | 3206 | 1660 | 1584 | 1370 | 1156 1319 |
563 | 444 | 1463 | 1318 | 1028 | 883 | 737 | 695 |
| L4 | 3460 | 3205 | 1658 | 1582 | 1366 | 1154 1292 |
559 | 440 | ||||||