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Issue 12, 2000
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An empirical correlation between stretching vibration redshift and hydrogen bond length

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Abstract

A correlation is found between the magnitude of the redshift (Δν=20 to 2500 cm−1 relative to the free molecule) of the stretching mode of H-bonded A–H groups in an A–H···B complex, and the length of the H-bond (rH···B=0.28 to 0.12 nm). The correlation is based on both new spectral data for narrow decoupled H-bands in cold isotopically diluted carbohydrate crystals with known H-bond distances and on literature spectral and structural data from a total of 36 systems. Once established, additional data for H-bonded crystals (hydrates, acid salts of carboxylic acids) and for gas phase dimer systems also fit this correlation quite well. Hydrogen bond enthalpies in the range of −ΔH=10–80 kJ mol−1 correlate with the inverse third power of the H-bond length. Literature experimental data on −ΔH and rH···B of ten gas phase dimers confirm this relationship.

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Article information


Submitted
20 Mar 2000
Accepted
18 Apr 2000
First published
25 May 2000

Phys. Chem. Chem. Phys., 2000,2, 2699-2702
Article type
Paper

An empirical correlation between stretching vibration redshift and hydrogen bond length

M. Rozenberg, A. Loewenschuss and Y. Marcus, Phys. Chem. Chem. Phys., 2000, 2, 2699
DOI: 10.1039/B002216K

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