APPLICATION OF HAMMETT EQUATION ON SPECTROSCOPIC DATA OF SOME ARYL SULPHONAMIDES

Abstract

Some N-(4-Chloro-1-naphthyl) substituted benzene sulphonamides have been synthesized by Ultrasound assisted condensation of 4-chloro-1-naphthylamine with various benzene sulfonyl chlorides in ethanol medium in room temperature. Infrared and NMR spectra of these sulphonamides were recorded. From the infrared spectra the SO2 and NH vibrations (, cm-1) were assigned. From the NMR spectra, the chemical shifts (δ, ppm) of NH protons and C-N carbons were assigned. These data were correlated with Hammett equation and various electronic effect coefficients through regression analysis. From the statistical analysis findings, the prediction of influence of electronic effects on the above functionalities in the sulphonamides was discussed.