On the Reaction of Derivatives of Thiosemicarbazide with Bis-Imidochlorides of Oxalic Acid

Article abstract of DOI:10.1007/BF00809296

Arylsubstituted oxalic bis-imidochlorides 1 react with thiosemicarbazones of type 5 as well as 13 to give five-membered-ring heterocycles 8, 11, and 16. 13C-NMR spectroscopy, chemical methods and X-ray crystallography have been used to investigate the nature of the structures obtained.The 13C-chemical shifts of 13 and imidazolidines 16 are correlated with Hammett ?_p constants and dual substituent parameters to evaluate the transmission of the X substituent electronic effects via the side-chain iminyl carbon atom into the heterocyclic ring and its neighbouring phenyl groups. - Keywords. 13C-NMR, Derivatives of oxalic acid; DSP-Analysis; NS-Heterocycles; Thiosemicarbazones; X-Ray crystallography.