title: The structure of uracil: a laser ablation rotational study.
abstract: The jet-cooled rotational spectrum of uracil has been investigated using laser ablation molecular beam Fourier transform microwave (LA-MB-FTMW) spectroscopy. The quadrupole structure originated by the two 14N nuclei of uracil has been completely resolved and assigned. This provides a definitive method to establish the pyrrolic or pyrimidinic nature of the N nuclei and allows us to conclude that the observed tautomer of uracil in the gas phase is the diketo form. From the rotational constants of the isotopic species detected, a structure of uracil has been determined.
authors: Grupo de Espectroscopía Molecular, Departamento de Química Física y Química Inorgánica, Universidad de Valladolid, 47005 Valladolid, Spain.
authors: Vanesa
authors: V
authors: Vaquero
authors: M Eugenia
authors: ME
authors: Sanz
authors: Juan C
authors: JC
authors: López
authors: José L
authors: JL
authors: Alonso