N,N'-Diacyl acid dihydrazides were pre- pared by the reaction of acid dihydrazides with two equivalents of acyl chlorides. The structures of these compounds were eluci- dated by 'H and '3C NMR spectroscopy. ... KEY WORDS N,N'-Diacyl acid dihydrazides 'HNMR 13CNMR ... INTRODUCTION The 'H NMR spectra of N,N'-diacyl acid dihydrazides exhibited one or two peaks in In connection with our work designed to syn- the range 69.34-10.96 assigned to the NH thesize ...