Abstract:The title compound, C13H12N2O2S, formed by Schiff base condensation of benzaldehyde with sulfanilamide, crystallizes as discrete molecular species linked by N—H⋯N and N—H⋯O hydrogen bonds between the sulfamide nitrogen H atoms and the azamethine N and one sulfamide O atom, respectively, forming a two-dimensional array in the bc plane. The azamethine group is rotated slightly out of the benzaldehyde benzene plane [C—C—C—N torsion angle = 8.1 (3)°], while the dihedral angle between the two benzene rings is 3… Show more
“…For benzene sulfonamide derivates, Loughrey et al [46] reported the bond lengths S 24 [47] are in agreement with the corresponding values of the title compound.…”
Section: Geometrical Parameters and First Hyperpolarizabilitysupporting
“…For benzene sulfonamide derivates, Loughrey et al [46] reported the bond lengths S 24 [47] are in agreement with the corresponding values of the title compound.…”
Section: Geometrical Parameters and First Hyperpolarizabilitysupporting
“…[25] These lengths have been reported 1.6023, 1.6059, 1.7974 and 1.8635 Å by Chandran et al [26], respectively. In our study, S1-O1, O2, N1, C4 have been computed 1.456, 1.458, 1.720 and 1.794 Å at the B3LYP/6-311G++(d,p) level.…”
The purpose of this study is to investigate the vibrational spectrum of tolbutamide by ab initio techniques in combination with experimental studies. The Fourier transform infrared spectra (400-4000 cm −1 ) and Laser-Raman spectra (100-4000 cm −1 ) of tolbutamide have been obtained in the solid phase. Assignments have been found by the combination of the vibrational frequencies and the contribution of the potential energy distributions. Assignments have been compared with the theoretical and experimental results of similar structures as reported in the literature. Structural parameters such as bond lengths and angles, frequencies and infrared intensities and Raman activities of tolbutamide have been computed by density functional theory and Hartree-Fock methods using 6-311G++(d,p) and 6-31G(d) basis sets. The computed vibrational frequencies and optimized structural parameters are consistent with the corresponding experimental results. In addition, the images of tolbutamide frontier molecular orbitals (highest occupied and lowest unoccupied) and its energy gaps have been interpreted with the assistance of quantum chemical calculations.
Highlights• Fourier transform infrared and Laser-Raman spectra of tolbutamide were recorded in solid phase.• Optimized geometry and vibrational frequencies of tolbutamide were calculated in combination with potential energy distribution analysis for the first time.• Frontier molecular orbital energies, structural stability and related molecular properties of tolbutamide were evaluated.
“…1) with bond lengths in the normal range expected for this class of compound [46][47][48][49][50]. The molecular structure of the compound is not planar with a dihedral angle C11AC12AS1AN2 of 72.1°and C13AC12AS1AN2 of À104.5°between the plane of the benzene ring and the ASANH 2 .…”
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