Table 1.
FT-IR spectroscopic data for ligands 3 and 4 before and after complexation.
| S. No. | Compounds | -N-H | C-H | C=N | C=C | C=S | C=O | C-O-C |
|---|---|---|---|---|---|---|---|---|
| 1 | ligand (3) | 3519–3738 | 3138–2949 | 1638–1620 | 1511–1400 | -- | 1680 | 1176 |
| 2 | 3a (ligand+Cu2+) | 3491–3370 | 3190–2901 | 1610, 1584 | 1521–1411 | -- | 1640 | 1171 |
| 3 | 3b (ligand+Ni2+) | 3481–3401 | 3200–2911 | 1612, 1588 | 1505–1431 | -- | 1638 | 1176 |
| 4 | 3c (ligand+Pd2+) | 3499–3378 | 3205–2933 | 1620, 1591 | 1505–1430 | -- | 1638 | 1170 |
| 5 | 3d (ligand+Co2+) | 3501–3391 | 3178–2918 | 1620, 1588 | 1508–1428 | -- | 1640 | 1170 |
| 6 | 3e (ligand+Fe2+) | 3511–3381 | 3186–2913 | 1618, 1601 | 1515–1429 | -- | 1638 | 1168 |
| 7 | 3f (ligand+Zn2+) | 3508–3402 | 3191–2939 | 1622, 1601 | 1511–1401 | -- | 1638 | 1180 |
| 8 | ligand (4) | 3523–3390 | 3196–2950 | 1628, 1610 | 1504–1424 | 1272 | -- | 1176 |
| 9 | 4a (ligand+Cu2+) | 3505–3401 | 3190–2940 | 1618, 1602 | 1511–1438 | 1231 | -- | 1188 |
| 10 | 4b (ligand+Ni2+) | 3511–3370 | 3188–2911 | 1609, 1608 | 1521–1411 | 1241 | -- | 1178 |
| 11 | 4c (ligand+Pd2+) | 3500–3388 | 3201–2933 | 1622, 1599 | 1518–1421 | 1238 | -- | 1178 |
| 12 | 4d (ligand+Co2+) | 3511–3401 | 3174–2919 | 1613, 1584 | 1515–1409 | 1232 | -- | 1187 |
| 13 | 4e (ligand+Fe2+) | 3508–3391 | 3181–2909 | 1617, 1602 | 1511–1434 | 1240 | -- | 1188 |
| 14 | 4f (ligand+Zn2+) | 3508–3400 | 3199–2919 | 1611, 1602 | 1505–1419 | 1236 | -- | 1175 |