Solvation State of Nicotinamide in Binary Solvents by 13C NMR Probing at Different Temperatures


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Abstract

Solvation state of pyridine-3-carboxamide (nicotinamide) was studied by means of different temperature nuclear magnetic resonance spectroscopy at different compositions of water–dimethyl sulfoxide solvent. The breaking of hydrogen bonds between heteronitrogen and water molecules takes place at XDMSO ~ 0.2–0.3 m.f. Changes in carboxamide substituent solvation consisting in the disappearance of water molecules occur at XDMSO ~ 0.4 m.f. The quantum chemical modeling of some nicotinamide solvates was performed along with NBO analysis and chemical shift calculations.

About the authors

V. V. Aleksandriiskii

Research Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemistry and Technology; Institute of Solution Chemistry, Russian Academy of Science

Email: injures@yandex.ru
Russian Federation, Ivanovo; Ivanovo

G. A. Gamov

Research Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemistry and Technology

Author for correspondence.
Email: injures@yandex.ru
Russian Federation, Ivanovo

S. V. Dushina

Research Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemistry and Technology

Email: injures@yandex.ru
Russian Federation, Ivanovo

V. A. Sharnin

Research Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemistry and Technology; Institute of Solution Chemistry, Russian Academy of Science

Email: injures@yandex.ru
Russian Federation, Ivanovo; Ivanovo

M. N. Zavalishin

Research Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemistry and Technology

Email: injures@yandex.ru
Russian Federation, Ivanovo


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