Volume-related properties of thiophene and furan-2-carboxaldehyde phenylhydrazone derivatives in DMSO: A discussion about non-intrinsic contribution
Abbreviated Journal Title
J. Chem. Thermodyn.
Limiting partial molar volume; Non-intrinsic contribution; Refractometry; Densitometry; Scaled-particle theory; Specific and; non-specific interactions; PARTIAL MOLAR VOLUMES; SCALED PARTICLE THEORY; DIMETHYL-SULFOXIDE; REFRACTIVE-INDEXES; BINARY-MIXTURES; SOLVATION THERMODYNAMICS; EQUIVALENT-REFRACTION; STRONG ELECTROLYTES; INFINITE DILUTION; AQUEOUS-SOLUTIONS; Thermodynamics; Chemistry, Physical
An analysis of the experimental and theoretical non-intrinsic contribution to the limiting partial molar volume, < theta >, of thiophene- and furan-2-carboxaldehyde phenylhydrazone, 4-nitrophenylhydrazone and 2,4-dinitrophenylhydrazone derivatives - henceforth referred as PHT, NHT, DHT, PHF, NHF and DHF, respectively - in dimethylsulfoxide is presented. A refractometric method to determine < theta > was proposed, which was able to successfully reproduce the method based on high-precision densitometry measurements at T = 293.15 K. No general trend of < theta > with the molecular size was observed. The theoretical values were calculated within the Scaled Particle Theory framework using both the Kharakoz equation and the Lee-Graziano model with a volumetric contribution from attractive interactions. The values of < theta > of the more rigid systems, were better represented by the Lee-Graziano model. The attractive term was examined considering the (solute + solvent) separation distance suggesting a possible contribution of specific interactions. (C) 2015 Published by Elsevier Ltd.
Journal of Chemical Thermodynamics
"Volume-related properties of thiophene and furan-2-carboxaldehyde phenylhydrazone derivatives in DMSO: A discussion about non-intrinsic contribution" (2015). Faculty Bibliography 2010s. 6390.