Evaluation Of Shear Relaxation Time And Derived Parameters From Ultrasonic Velocity Measurements Of Cu(I) And Some Tetraalkyl Ammonium Salts In Binary Organic Mixtures To Study Various Structural Effects

Abstract

The study of ion-solvation has attracted the attenuation of many workers during the last few years (1–8). In case of binary solvent mixtures both the solvent components play an important role towards solvation of ions. The physical extreme of solvation is the transfer of an ion from vacuum to the solvent while the chemical extreme of solvation describes the stoichiometric chemical reaction with the solvent. The behavior of electrolytes in solutions mainly depends on the ion-ion and ion-solvent interactions. Ion-ion interaction in general, is stronger than the ion-solvent interactions. Ion-ion interaction in dilute electrolytic solutions is well understood by ion-solvent interaction still remain partially explained. The solvation behavior of ions in mixed solvent has become an important subject to study the structural effects of many compounds (9–19). Binary mixture of water with organic solvents have been frequently used for the study of electrolytic solutions. In such solvent mixtures the solvent structural effects are generally very strong. Consequently, ion solvation effects are overshadowed by the solvent structural effects. In order to minimize solvent structural effects attempts had been made for the study of ion-solvent interactions in binary mixtures of non-aqueous solvents with a non-polar component (20–25). The non-polar component of the solvent mixture played no significant role in ion solvation except to change the solvent properties such as dielectric constant and viscosity of the medium.