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 in 1,4-dioxane were measured at 318.15K. <...> From these experimental data, various acoustical properties such as specific impedance (Z), adiabatic compressibility ( length (Lf), Rao's molar sound function (Rm), molar compressibility (W), relaxation strength (r), the Vander Waals constant (b), internal pressure ( were determined. <...> The parameters were correlated with concentration and interpreted in the light of molecular interactions occurring in the solutions. <...> INTRODUCTION Thermodynamic and transport properties of electrolytes and non-electrolytes in various solvents are of interest in various technologies. <...> These properties are useful for the better understanding of various interactions occurring in the solutions. <...> Literature survey shows that very little work has been done for solutions of solid organic compounds [1-6]. <...> 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. <...> The structures of these compounds were confirmed by IR, NMR and CHN analysis. <...> The structures are given in Figure 1 and physical constants of the compounds are given in Table 1. <...> ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ 2008 том 51 вып. 1 Ultrasonic velocity, density and viscosity of solutions of some derivatives of sulphonamide s), intermolecular free ), free volume (Vf), solvation number (Sn) etc., Compound Code -phenylvinyl)benzene H2 1:4-(aza-2-phenylvinyl)benzene amide O O S O NH2 O S O NH2 SOSM1:4-(aza-2-phenylvinyl)benzene sulfonamide SOSM1:4-(aza-2-phenylvinyl)benzene sulfonamide SOSM1 SOSM2 SOSM3 SOSM4 SOSM1 O S O NH2 N N N N S 2-methoxy phenyl)vinyl] benzene SOSM2 M-2:4-[aza-2-methoxy phenyl)vinyl] benzene amide S O NH2 O S O NH2 O S O NH2 N N O S O NH2 N CH3 SOSM-2:4-[aza-2-methoxy <...>