title: [Investigation of tautomeric composition of cytosine by multiphoton excitation spectra. I. Resonance hyper-Raman spectra].
abstract: For the first time the quantum-mechanical calculations of intensity distribution in the resonance hyper-Raman spectra of the six tautomeric forms of cytosine were performed. It has been confirmed that in the aqueous solution of cytosine (pH 3.0) there exist several molecular structures: cytosine in the canonical amino-oxo tautomeric form, cation, as well as cys-imino-oxo and cys-amino-hydroxy tautomers; in the gaseous phase at 235 degrees C cys-imino-oxotautomer dominates with the presence of small amount of cys-, trans-, amino-hydroxy tautomers and the caconical form of cytosine.
authors.forename: T G
authors.initials: TG
authors.lastname: Burova
authors.forename: M N
authors.initials: MN
authors.lastname: Nurlygaianova
authors.forename: G N
authors.initials: GN
authors.lastname: Ten
mesh_terms: D003596:Cytosine / Q000737:chemistry*; D007536:Isomerism; D013059:Spectrum Analysis, Raman
chemical_list: D003596:Cytosine