Gas-phase tautomers of protonated 1-meth
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Chunxiang Yao; Maria L. Cuadrado-Peinado; Miroslav Polรกลกek; Frantiลกek Tureฤek
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Article
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2005
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John Wiley and Sons
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English
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## Abstract Tautomers of 1โmethylcytosine that are protonated at Nโ3 (1^+^) and Cโ5 (2^+^) have been specifically synthesized in the gas phase and characterized by tandem mass spectrometry and quantum chemical calculations. Ion 1^+^ is the most stable tautomer in aqueous and methanol solution and i