| Compound | υ (H2O) | υ (NH2) | υ (C=O) | υ (C-N) | υ (C=S) | υ (M-O) | υ (M-N) |
| L1 | - | 3436b | - | 1563s | 1259s | - | - |
| L1 + Co(II) | 3547w 839s | 3400b | - | 1598s | 1229w | 590 | 472 |
| L1 + Ni(II) | 3527w 824s | 3392b | - | 1576s | 1225w | 589 | 470 |
| L1 + Cu(II) | 3538w 896s | 3351b | - | 1587s | 1227w | 593 | 474 |
| L2 | - | 3424b | 1663s | 1553s | - | - | - |
| L2 + Co(II) | 3542w 824s | 3412b | 1619s | 1570s | - | 588 | 470 |
| L2 + Ni(II) | 3525w 839s | 3369b | 1653w | 1579s | - | 584 | 480 |
| L2 + Cu(II) | 3538w 850s | 3352b | 1650w | 1580s | - | 592 | 450 |