THE MICROWAVE SPECTRUM OF 5-METHYLTHIAZOLE: METHYL INTERNAL ROTATION, 14N NUCLEAR QUADRUPOLE COUPLING AND ELECTRIC DIPOLE MOMENT

Article abstract of DOI:10.1016/0022-2860(88)80292-8

The microwave spectrum of 5-methylthiazole has been investigated in the frequency range from 8 to 36 GHz, employing both Fourier transform and Stark spectroscopy.Double resonance MWFT techniques with broadband pump excitation were applied in order to facilitate the assignment of the spectrum.The results of methyl internal rotation, 14N quadrupole hyperfine structure and fourth order centrifugal distortion analyses are given.The dipole moment components, with respect to the principal inertia axes system, could be determined from the Stark splittings of selected rotational lines.