Table 3: IR and NMR data for the reported complexes.
| Complex | IR data (cm−1)∗ | 1H NMR data (ppm) | |||
| υ(OH) | υ(C=N) | υ(C=C) | υ(NO2) | ||
| [Co(L)2(H2O)2] | 3,436 (m,b) | 1,605 (s) | 1,539 (m) 1,454 (m) | 1,404 (m) 1,239 (m) | — |
| [Ni(L)2(H2O)2] | 3,437 (m,b) | 1,606 (s) | 1,539 (m) 1,484 (m) | 1,403 (m) 1,237 (m) | — |
| [Cu(L)(H2O)]CH3COO | 3,436 (m,b) | 1,611 (s) | 1,545 (m) 1,506 (m) | 1,402 (m) 1,239 (m) | — |
| [Zn(L)(H2O)]CH3COO | 3,431 (m,b) | 1,611 (s) | 1,543 (sh) 1,474 (m) | 1,407 (m) 1,238 (m) | 9.54 s (HC=N), 8.89–8.05 m (quinoline ring), 7.90–6.68 (phenyl ring) |
| [Pd(HL)Cl2] | 3,133 (m,b) | 1,601 (s) | 1,544 (m) 1,505 (m) | 1,385 (m) 1,232 (m) | 12.20 b,s (OH), 10.23 s (HC=N), 8.43–7.92 m (quinoline ring), 7.72–6.92 (phenyl ring) |
| ∗m, medium; s, strong; b, broad; sh, shoulder. | |||||