Issue 17, 1995

Ultrasonic velocity, conductivity, viscosity and calorimetric studies of copper(I) and sodium perchlorates in cyanobenzene, pyridine and cyanomethane

Abstract

Ultrasonic velocities (u), densities (ρ), viscosities (η), molar conductivities (Λ) and enthalpies of solution (ΔsolH) of CuClO4 and NaClO4 have been measured in cyanobenzene, pyridine and cyanomethane at 298, 308 and 318 K. These data have been used to calculate isentropic compressibilities (κs) of the salts and limiting ionic conductivities (λoi), solvated ionic radii (ri) and solvation numbers (n) for Cu+, Na+ and ClO4. Cu+ is highly solvated in all three solvents with solvation decreasing in the order pyridine > cyanomethane > cyanobenzene. Na+ in all solvents is relatively less solvated and the solvation decreases in the order cyanomethane [double greater-than, compressed] cyanobenzene [double greater-than, compressed] pyridine. The ClO4 ion is poorly solvated in all three solvents. κs and ΔsolHo data indicate that NaClO4, in spite of its poor solvation in pyridine, shows strong structural effects which are attributed to strong pyridine–pyridine interactions.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans., 1995,91, 2789-2795

Ultrasonic velocity, conductivity, viscosity and calorimetric studies of copper(I) and sodium perchlorates in cyanobenzene, pyridine and cyanomethane

D. S. Gill, P. Singh, J. Singh, P. Singh, G. Senanayake and G. T. Hefter, J. Chem. Soc., Faraday Trans., 1995, 91, 2789 DOI: 10.1039/FT9959102789

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