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Volumetric, Electric, and Magnetic Properties of Thioxanthen-9-one in Aprotic Solvents as Revealed by High-Precision Densitometry, High-Accuracy Refractometry and Magnetic Susceptibility Measurements and by DFT Calculations

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High-precision densitometry measurements of solutions of thioxanten-9-one (TX) in 1,4-dioxane, DMSO, toluene, and benzene have been obtained at 293.15, 303.15, 313.15, 323.15, 333.15, and 343.15K. The partial molar volumes of TX (\(\bar V _2\)) and the corresponding values at infinite dilution (\(\bar V _{2,0}\)) were determined. The partial molar expansibility (\(\bar E _{2,0}\)) of TX at infinite dilution in each solvent is temperature independent. Dynamic electronic polarizabilities \(\bar \alpha _{2(\nu)}\) of TX in each aprotic solvent were determined by the Singer–Garito approach. These values are in excellent concordance with the theoretical value for TX of 2.611×10−23cm3 estimated here using DFT/B3LYP/6-311++G(d,p). The partial molar volumes of TX at infinite dilution were calculated and interpreted in terms of the Scale Particle Theory (SPT). The solvent influence on the partial molar volume of TX was found to be due mainly to cavity formation and intermolecular dispersion forces.

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  1. Laboratorio de Electrónica Molecular (L.E.M.), Grano de Oro, Maracaibo, República Bolivariana de Venezuela;

    Ysaías J. Alvarado, José Caldera-Luzardo, Carlos De La Cruz & Gladys Ferrer-Amado

  2. Laboratorio de Espectroscopía Molecular y Atómica (L.E.M.A), Grano de Oro, Maracaibo, República Bolivariana de Venezuela;

    Carlos De La Cruz

  3. Laboratorio de Síntesis orgánica y dise~o de Fármacos, Departamento de Química, Facultad Experimental de Ciencias, La Universidad del Zulia (LUZ), Grano de Oro, Maracaibo, República Bolivariana de Venezuela;

    Elba Michelena

  4. Laboratorio de Física de la Materia Condensada, Instituto Venezolano de Investigaciones Científicas (IVIC), Carretera Panamericana Km. 11, Altos de Pipe, Los Teques, República Bolivariana de Venezuela;

    Pedro Silva

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Alvarado, Y.J., Caldera-Luzardo, J., De La Cruz, C. et al. Volumetric, Electric, and Magnetic Properties of Thioxanthen-9-one in Aprotic Solvents as Revealed by High-Precision Densitometry, High-Accuracy Refractometry and Magnetic Susceptibility Measurements and by DFT Calculations. J Solution Chem 35, 29–49 (2006). https://doi.org/10.1007/s10953-006-8937-0

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