Influence of the hydrogen bond on the N-H stretching frequencies in amino-acids

Krishnan, RS and Krishnanand, KN (1964) Influence of the hydrogen bond on the N-H stretching frequencies in amino-acids. In: Proceedings of the Indian Academy of Sciences - Section A, 60 (1). pp. 11-19.

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Abstract

The spectra of glycine, its addition compounds and other amino-acids exhibit Raman lines in the region from 3250 cm.−1 to 2500 cm.−1 It has been shown that these lines cannot be assigned to N-H...O stretching vibrations, where the N atom has the covalency of three, but to N+-H...O stretching vibration where the N atom has the covalency of four. Using the data obtained with triglycine sulphate which has the largest number of N+-H...O bonds and whose H bond lengths are known, the correlation curve giving the relation between the N+-H...O stretching frequencies and the corresponding H bond lengths has been drawn. Using this correlation curve, the N+-H...O stretching frequencies appearing inα-glycine,γ-glycine, diglycine hydrochloride, diglycine hydrobromide,l-asparagine monohydrate anddl-alanine have been satisfactorily accounted for on the basis of the known hydrogen bond lengths in these substances.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to Indian Academy of Sciences.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Jun 2010 08:56
Last Modified:	19 Sep 2010 06:07
URI:	http://eprints.iisc.ernet.in/id/eprint/28004

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