| Compound | δ CH3 | δ CHO | δ H2O | δ (Ar-H) | δ NH2 |
| L1 | 2.50 | ------ | ------ | 7.2 - 7.5 | 8.0 |
| L1 + Ni(II) | 2.48 | ------ | 3.29 | 7.12 - 7.59 | 7.89 |
| L2 | ------ | ------ | ------ | 7.29 - 7.51 | 7.9 |
| L2 + Cu(II) | ------ | ------ | 3.34 | 7.0 - 7.4 | 7.82 |