Synthesis and Spectral Studies of some N-[(E)-Phenylmethylidene]benzenesulfonamides

Abstract

A series of some N- [(E)-phenylmethylidene]benzenesulfonamide derivatives have been synthesised using solid SiO 2 -H 3 PO 4 catalyst under solvent free conditions in microwave irradiation. The synthesised E-N-benzene sulfonilimines purities have been verified by their physical constants and spectroscopic data. The spectral frequencies are correlated with Hammett substituent constants, F and R parameters using linear regression analysis. From the results of statistical analysis the effect of substituents on the group frequencies will be discussed.

Effect of Substituents on Phenazine Derivatives by Spectral Studies

“…The assigned the C=N stretches (cm -1 ) of the present investigation substituted phenazines were tabulated in Table 1. These data were correlated with Hammett substituent constants, F and R parameters [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In this correlation, the Hammett equation was employed as,…”

“…The 13 C NMR chemical shifts of CN pyridine and phenazines moieties were assigned and are presented in Table 1. These chemical shifts were correlated with Hammett substituent constants, F and R parameters using single and multi-regression analysis [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In these correlations, the Hammett equation was taken in the form as, δ = δ 0 + ρσ (2) Where δ 0 is the chemical shift of the corresponding parent compound.…”

“…Nair et al, have studied the optical properties of phenazine-Ru complexes [17]. Qsar and qspr study was established with various compounds such as chalcones [18], pyrazolines [19], imines [20], flavones [21], pyrimidines [22], carboxamides [23], oxazines [24], epoxides [25], sulfonamides [26], acyl bromides [27], Tröger's bases [28], di-imines [29]and thiadiazoles [30]. Thirunarayanan and Sekar was studied the spectral qsar correlations in the pyrazoline derivatives [31].…”

Effect of Substituents on Phenazine Derivatives by Spectral Studies

“…These chemical shifts were correlated with Hammett substituent constants, F and R parameters using single and multi-regression analysis [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In these correlations, the Hammett equation was taken in the form as, δ = δ 0 + ρσ (2) Where δ 0 is the chemical shift of the corresponding parent compound.…”

“…Nair et al, have studied the optical properties of phenazine-Ru complexes [17]. Qsar and qspr study was established with various compounds such as chalcones [18], pyrazolines [19], imines [20], flavones [21], pyrimidines [22], carboxamides [23], oxazines [24], epoxides [25], sulfonamides [26], acyl bromides [27], Tröger's bases [28], di-imines [29]and thiadiazoles [30].…”