Table 1: Comparison of the experimental and calculated harmonic frequencies for Schiff base ligands.
Experimental | Calculated | Frequency (cm−1) | ||
Amine N-H stretch | Ketone C=O stretch | Imine C=N stretch | ||
L1 | 3,267 | 1,646 | 1,487 | |
L1 | 3,531 | 1,675 | 1,494 | |
L2 | 3,243 | 1,651 | 1,491 | |
L2 | 3,528 | 1,675 | 1,493 | |
L3 | 3,341 | 1,670 | 1,445 | |
L3 | 3,508 | 1,677 | 1,494 | |