THERMODYNAMIC AND STRUCTURAL CHARACTERISTICS OF AQUEOUS ALKANOLAMINE SOLUTIONS
A. G. Titova1, M. A. Krest’yaninov2, A. M. Zaichikov1
1Ivanovo State University of Chemistry and Technology, Ivanovo, Russia
2Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russia
Keywords: внутреннее давление, межмолекулярные взаимодействия, термодинамические и структурные характеристики водных растворов аминоспиртов, вода, апротонные амиды, internal pressure, intermolecular interactions, thermodynamic and structural characteristics of aqueous alkanolamine solutions, water, aprotic amides
Abstract
Thermodynamic characteristics are calculated for aqueous alkanolamine solutions that are obtained by substituting alkyl radicals for the protons in the amino group of monoethanolamine and form no hydrogen bond networks. Patterns are found in the variations of the structural properties of the mixtures. A correlation is observed between the entropy and enthalpy characteristics of the water-alkanolamine systems with excess packing coefficients, suggesting that the structural and energy properties of aqueous solutions of these alkanolamines are determined by universal interactions. The concentration curves for the structural and thermodynamic characteristics of the systems are symbatic with the data on water-aprotic amide mixtures. Explanations of this behavior are discussed by comparing the results with the previous data on aprotic amide solutions.
DOI: 10.1134/S0022476615010096
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