13C nmr of N,N'-diformyl-, N,N'-diacetyl-S and N,N'-di-(trifluoroacetyl)hydrazines and their methyl analogs

Abstract

The molecular conformations of the N,N'-diformyl-, N,N'-diacetyl-, and N,N'-di(trifluoroacetyl)hydrazines, and their methyl analogs, were determined by the13C NMR method. A similarity was observed in the change of the13C spectral parameters of the conformers of diacylhydrazines and amides. Hindered rotation around the N-N bond in the13C NMR spectra of N,N'-di(trifluoroacetyl)dimethylhydrazine could not be detected.