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

L13,2671,6461,487
L13,5311,6751,494
L23,2431,6511,491
L23,5281,6751,493
L33,3411,6701,445
L33,5081,6771,494