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The present work reports the experimental densities  ρ  and ultrasonic speeds  u  of binary mixtures of 2-dimethylaminoethanol (2-DMAE) and 2-diethylaminoethanol (2-DEAE) with water at temperatures 293.15, 303.15 and 313.15 K over the entire composition range. Excess molar volume, excess ultrasonic speed  u E, excess isentropic compressibility, excess intermolecular free-lengthand excess molar isentropic compressionwere calculated using the experimental data. The variations of excess parameters are modelled by the Redlich-Kister polynomial equation rendering strong deviations from ideality. The excess partial molar compressionsand, excess partial molar compressions at infinite dilutionandexpose about the structural configuration and molecular bonding in the aqueous binary system. The consequences of aqueous 2-DMAE/2-DEAE system may become a driving force for hydrophobic hydration to support solute-solvent hydrophilic interaction. The pattern and position of FT-IR spectra (recorded at room temperature 293.15 K) was consistent with the variations of excess parameters.

Ultrasonic Speeds, Molar Isentropic Compressions and FTIR analysis of aqueous solutions of 2-dialkylaminoethanols from 293.15 to 313.15 K