Temperature effect on the solvation of two ionic resorcin[4]arenes from volumetric and acoustic properties in polar media

Abstract The volumetric and acoustic properties of two ionic C -methylresorcin[4]arenes, one bearing –CH 2 SO 3 Na (Na 4 MeRA) and the other –CH 2 N(CH 3 ) 2 ·HCl (TAM·(HCl) 4 ) residues in the upper rim, were determined in water and dimethylsulfoxide (DMSO) as a function of temperature in 5 K intervals, covering 278.15–308.15 K for water and 293.15–308.15 K for DMSO solutions. From these data derived quantities, such as standard molar properties, interaction volumes, transfer volumes and solvation numbers were calculated. The results were interpreted in terms of solvation processes.