Table 4: Calculated and experimental IR bands.

Calculated frequencies (cm−1)Experimental frequencies (cm−1)Attribution

3991
3862
3600 Stretching (O–H)
3520
3392
3380
3190
Stretching (N–H)
30583000Stretching (C–H)
19451728Stretching (C=O)
17901550–1700Stretching (C=C)
17481512Bending (O–H)
16881447Bending (N–H)
1242–16281200–1330Stretching (C=C), (C–N)
500–1150500–1150Bending (C–H), (N–H)