The duplication of characteristic signals for NH and N=CH groups observed in both 1 H and C NMR spectra (Table and Due to the assembly of amide and imine functionalities, acrylohydrazides can exist as stereoisomers with a C=N double bond (geometric configurations Z or E) and as syn/antiperiplanar conformers around the amide (C(O)-NH) bond. In the 1 H NMR spectra, the maximum intensity difference for compounds (4a-h) confirms that both conformers were obtained with different ratios (Table ). These ratios were calculated using the following relationship: