Abstract
AbstractThe interaction between N, N, 1, 9‐tetramethylguanine and the Li+ ion is investigated in acetonitrile and in the solid state by FT‐IR spectrophotometry. The spectroscopic results are in agreement with the ab initio calculations of Del Bene which predict a structure where Li+ is bonded to the N7 and O6 atoms. In contrast, protonation takes place on the N7 atom. The comparison of results for other carbonyl systems allows to establish a correlation between the calculated elongation of the carbonyl bond and the frequency variation of the °C = O vibration.
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