Compound | Infra-red spectral bands [cm−1] | ||||
O-H | C-O | C=N | C-N | M-N | |
8-HQ | 3141 - 3241 | 1094 | 1581 | 1273 | - |
Cu(II)-8HQ | - | 1110 | 1572 | 1279 | 583 |
Co(II)-8HQ | 3227 | 1106 | 1576 | 1281 | 567 |
Ni(II)-8HQ | 3208 | 1106 | 1577 | 1281 | 569 |