Time Domain Reflectometric and spectroscopic studies on toluene plus butyronitrile solution

The dielectric parameters of toluene + butyronitrile solution have been obtained by time domain reflectometry (TDR) technique in the frequency range from 10 MHz to 30 GHz at 298 K. Spectroscopic (FTIR and 13C NMR) studies have also been carried out on the solution and the results of the studies show that neat butyronitrile is self-associative through C-H center dot center dot center dot N contacts and weak intermolecular forces of C-H center dot center dot center dot N and C-H center dot center dot center dot pi type are operative in the solution. The obtained dielectric parameters such as Kirkwood correlation factor g, relaxation time tau etc. have been analyzed in view of these weak intermolecular forces. The weak non-covalent interactions between heteromolecules appear to have no influence on the ideality of epsilon(m) vs X-2 curve of the solution. Heteromolecular entities with weak intermolecular forces experience larger hindrance leading to longer relaxation time tau. Crown Copyright (C) 2015 Published by Elsevier B.V. All rights reserved.