M. Belkov, A. Harbachova, G. Ksendzova
Mar 30, 2010
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Journal
Journal of Applied Spectroscopy
Abstract
IR-Fourier spectroscopy methods are adopted to the study of intramolecular interactions occurring in CCl4 solutions of antivirally active derivatives of N-(3,5-di-tert-butyl-2-hydroxyphenyl)acetamide. Analysis of IR spectra has shown that intramolecular H-bonds O–H···O=C and N–H···O=C are formed in solutions of these compounds. The O–H···O=C and N–H···O=C bond strengths and the direction of the equilibrium shift between the two types of conformers depend on the type of carbonyl group substituent. An intramolecular O–H···O=C H-bond is characteristic of highly active derivatives of N-(3,5-di-tert-butyl-2-hydroxyphenyl)acetamide.