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Densities, viscosities, and ultrasonic velocities of the binary mixtures of N-methylacetamide + 2-methoxyethanol and + water have been measured at (308.15, 313.15, and 318.15) K. The excess molar volumes, viscosity deviations, and isentropic compressibility changes of the mixture from the ideal mole fraction rule have been calculated from these data. The computed results have been fitted to the Redlich-Kister polynomial.

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Precise measurements on electrical conductances as well as laser Raman spectra in the wavenumber range 3500-100 cm -1 of five lithium salts in 1,2-dimethoxyethane (DME) have been reported. The conductance data are interpreted by the Fuoss-Kraus theory, yielding values for the ion-pair and triple-ion formation constants. The Raman spectra suggest the presence of "spectroscopically free" ClO 4 -, BF 4 -, and AsF 6 -, ions in solutions, whereas there is no such evidence for either the Clor Brion, thus substantiating the very high ion-pair formation constants for LiCl and LiBr as obtained from conductance measurements. The observed processes have been interpreted by an Eigen multistep mechanism. Changes in the Raman bands at ca. 867, 1147, 1452, and 2805 cm -1 suggest that the solvation of Li + ion in DME occurs through the ethereal oxygen atom of the solvent molecule.

Electrical conductances, relative viscosities, and apparent molal adiabatic compressibilities of solutions of some symmetrical tetraalkylammonium perchlorates in 2-methoxyethanol (ME) have been reported. The conductance data have been analyzed by the 1978 Fuoss conductance equation and the viscosity data by the Jones–Dole equation for associated electrolytes. The ionic contribution to the limiting equivalent conductance, viscosity B coefficient and other thermodynamic parameters have been determined using the “reference electrolyte” method. The viscosity data show that the tetraalkylammonium ions are poorly solvated and behave as structure-breakers in 2-methoxyethanol. Analysis of the conductance as well as the compressibility data reveals the existence of strong ion-ion interactions in this solvent medium. The compressibility data also indicate the electrostriction of solvent molecules around the tetraethylammonium ion, while for the larger tetraalkylammonium ions they are accommodated inside the space between the coiled alkyl chains attached to the nitrogen atom.

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