Acoustical studies of some schiffbases in 1, 4-dioxant at 318. 15 K

акустические исследования шиффовые основания диоксаны

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Shipra Baluja ACOUSTICAL STUDIES OF SOME SCHIFF BASES IN 1,4-DIOXANE AT 318.15 K (Department of Chemistry, Saurashtra University) Rajkot-360005, (Gujarat), India, E. mail: shkundal_ad1@sancharnet.in Ultrasonic velocity, density and viscosity of solutions of some derivatives of sulphonamide in 1,4-dioxane were measured at 318.15K. <...> From these experimental data, various acoustical properties such as specific impedance (Z), adiabatic compressibility (s), intermolecular free length (Lf), Rao's molar sound function (Rm), molar compressibility (W), relaxation strength (r), the Vander Waals constant (b), internal pressure (), free volume (Vf), solvation number (Sn) etc., were determined. <...> INTRODUCTION Thermodynamic and transport properties of electrolytes and non-electrolytes in various solvents are of interest in various technologies. <...> Thus, with a view to understand the molecular interactions in solutions of schiff bases, the present 32 paper deals with sound velocity studies of the solutions of some Schiff bases derived from sulphonamide in 1,4-dioxane at 318.15 K. EXPERIMENTAL The derivatives of sulphonamide were synthesized in our laboratory and purified. <...> Structure of Schiff bases: SOSM1 – 4-(aza-2-phenylvinyl)benzene sulfonamide, SOSM2 – 4-[aza-2-(methoxy CH3 CH3 CH3 O CH3 phenyl)vinyl] benzene sulfonamide, SOSM3 – 4-(1-aza-2-(methoxylthiophenyl)vinyl] benzene sulfonamide, SOSM4 – 4-[1aza-2-(4-hydroxy-3-methoxy phenyl) vinyl] benzene sulfonamide The solvent 1,4-dioxane was purified and estimated purity was better than 99.8%. <...> Physical constants of Schiff bases % Yield O S O NH2 value Rf C SOSM3:4-[1-aza-2-(methylthiophenyl) vinyl] benzene sulfonamide SOSM3:4-[1-aza-2-(methylthiophenyl) vinyl] benzene sulfonamide SOSM3 O S O NH2 SOSM3:4-[1-aza-2-(methylthiophenyl) vinyl] benzene sulfonamide O S O NH2 O S O NH2 Concentration, M H SOSM3:4-[1-aza-2-(methylthiophenyl) vinyl] benzene sulfonamide C, H, N analysis N S Obs. <...> The decrease of s with increasing concentration might be due to aggregation of solvent molecules around solute molecules indicating the presence of solvent-solute interactions in all the four systems. <...> This may be due to the presence of OH group in SOSM4, which forms Hbonding with the solvent molecules. <...>

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