IR spectra of guanine and hypoxanthine isolated molecules

High resolution spectra of guanine, hypoxanthine, isocytosine, 2-aminopyrimidine and their deutero- and methyl derivatives obtained in Ar matrices by the low temperature IR spectroscopy method are reported. Normal modes of enol tautomers of guanine, 9-CH 3-guanine, hypoxanthine and 2-aminopurine are...

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Bibliographic Details
Published in:Journal of molecular structure 1987-05, Vol.158, p.275-292
Main Authors: Sheina, G.G., Stepanian, S.G., Radchenko, E.D., Blagoi, Yu.P.
Format: Article
Language:English
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Summary:High resolution spectra of guanine, hypoxanthine, isocytosine, 2-aminopyrimidine and their deutero- and methyl derivatives obtained in Ar matrices by the low temperature IR spectroscopy method are reported. Normal modes of enol tautomers of guanine, 9-CH 3-guanine, hypoxanthine and 2-aminopurine are calculated. Force fields are the same as for purine. Results calculated are used to interpret the experimental spectra. Keto—enol tautomerism is shown to exist in guanine and hypoxanthine, the proportions of enol tautomer being 50 and 5%, respectively. Possible biological applications of the results obtained are discussed.
ISSN:0022-2860
1872-8014
DOI:10.1016/0022-2860(87)80024-8