ISSN:
1432-2234
Keywords:
Cytosine tautomers
;
Thymine tautomers
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The relative stabilities of a series of cytosine and thymine tautomers have been investigated by means of non-empirical (ab initio) LCAO-MO-SCF Hartree-Fock-Roothaan calculations employing a small contracted Gaussian basis set (STO-3G) in all cases. The relative stabilities of the various tautomeric forms agree in general with the results of earlier empirical and semi-empirical calculations on these molecules. In particular, the “enol forms” of cytosine and thymine, within the isolated molecule approximation inherent in these MO calculations, are predicted to possess greater stability than the forms commonly assigned to these molecules in aqueous solution and found in the solid state by X-ray crystallographic studies.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00547781
Permalink