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Tautomeric forms of purines resulting from proton shifts between nitrogens N 7 and N 9
Author(s) -
Pullman Bernard,
Bergmann Ernst D.,
WeilerFeilchenfeld Hannah,
Neiman Zohar
Publication year - 2009
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560030715
Subject(s) - tautomer , bathochromic shift , chemistry , xanthine , dipole , computational chemistry , purine metabolism , purine , proton , stereochemistry , physics , organic chemistry , quantum mechanics , fluorescence , enzyme
Measurements of the dipole moments and the electronic spectra of suitably substituted derivatives of xanthine and purine confirm the predictions, obtained by various methods of calculation, that the tautomeric forms of these two bases [N(7)H and N(9)H] have different dipole moments and that the N(7)H forms should be bathochromic as compared with the N(9)H ones.