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Twenty three N-(2-/3-substituted phenyl)-4-substituted benzenesulphonamides of the general formula, 4-X’C 6 H 4 SO 2 NH(2-/3-XC 6 H 4 ), where X’ = H, CH 3 , C 2 H 5 , F, Cl or Br and X = CH 3  or Cl have been prepared and characterized, and their infrared spectra in the solid state,  1 H and  13 C NMR spectra in solution were studied. The N-H stretching vibrations, νN−H, absorb in the range 3285 - 3199 cm−1, while the asymmetric and symmetric SO 2  vibrations vary in the ranges 1376 - 1309 cm −1  and 1177 - 1148 cm −1 , respectively. The S-N and C-N stretching vibrations absorb in the ranges 945 - 893 cm −1  and 1304 - 1168 cm −1 , respectively. The compounds do not exhibit particular trends in the variation of these frequencies on substitution either at ortho or meta positions with either a methyl group or Cl. The observed  1 H and  13 C chemical shifts ofare assigned to protons and carbons of the two benzene rings. Incremental shifts of the ring protons and carbons due to -SO 2 NH(2-/3-XC 6 H 4 ) groups in C 6 H 5 SO 2 NH(2-/3-XC 6 H 4 ), and 4- X’C 6 H 4 SO 2 - and 4-X’C 6 H 4 SO 2 NH- groups in 4-X’C 6 H 4 SO 2 NH(C 6 H 5 ) are computed and employed to calculate the chemical shifts of the ring protons and carbons in the substituted compounds, 4-X’C 6 H 4 SO 2 NH(2-/3-XC 6 H 4 ). The computed values agree well with the observed chemical shifts.

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Synthetic, Infrared,  1 H and  13 C NMR Spectral Studies on N-(2-/3-Substituted Phenyl)-4-Substituted Benzenesulphonamides, 4-X’C 6 H 4 SO 2 NH(2-/3-XC 6 H 4 ), where X’ = H, CH 3 , C 2 H 5 , F, Cl or Br, and X = CH 3  or Cl