Monatshefte fur Chemie p. 1125 - 1138 (1989)
Update date:2022-08-02
Topics:
Beckert, Rainer
Gruner, Margit
Seidel, Ingeborg
Kuban, Ralf-Juergen
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.
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