Prof. José L. Alonso, Dr. Vanesa Vaquero, Dr. Isabel Peña, Prof. Juan C. López, Santiago Mata and Prof. Walther Caminati All Five Forms of Cytosine Revealed in the Gas Phase Angewandte Chemie International Edition 52
Give me five! All five tautomers and conformers of cytosine were characterized in the gas phase by laser ablation molecular beam Fourier transform microwave spectroscopy. The spectra were assigned unambiguously on the basis of the hyperfine structure due to the three 14N nuclei (see picture; N blue, O red). The relative energies of the identified species were estimated from the relative intensities of the spectra.
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