| Autor: |
B.P. Asthana, K. S. Pandey, P. C. Mishra |
| Rok vydání: |
1993 |
| Předmět: |
|
| Zdroj: |
Spectrochimica Acta Part A: Molecular Spectroscopy. 49:53-72 |
| ISSN: |
0584-8539 |
| DOI: |
10.1016/0584-8539(93)80261-8 |
| Popis: |
The IR and Raman spectra of 8-azaguanine and 8-azaadenine have been studied. The spectra of 8AG have been critically examined and compared with those of guanine and 9-methylguanine. Similarly, the spectra of 8-azaadenine have been examined and compared with those of adenine and 9-methyladenine. It has been possible to refute or accept the assignments for certain frequencies proposed earlier in the parent molecules by other workers, and thus almost unambiguous assignments for several frequencies in guanine and adenine as well as in 8AG and 8AA have been obtained. Several frequencies have been explained as combinations involving a 130 cm−1 vibration which has been assigned to the ring-folding mode. It is found that not as many combination bands involving this mode occur in 8AA as those in 8AG. These observations indicate that guanine and 8AG are geometrically more flexible than adenine and 8AA. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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