ISSN:
1432-2234
Keywords:
Magnetic circular dichroism spectra
;
Azapurine
;
Azaadenine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The magnetic circular dichroism spectra of 9-methyl-8-azapurine and of 7-, 8-, and 9-methyl-8-azaadenine have been found to be well resolved; as many as four distinct electronic bands are observable in the 200–350 nm spectral region. CNDO calculations indicate that π → π* excitations are responsible for almost all of the MCD intensity. A comparison of four different parameterizations shows that a modification of Del Bene and Jaffé's CNDO/S procedure correctly predicts, with one exception, the sign of the observed B-terms and is therefore the most satisfactory method.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00548084
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