SPECTRA AND STRUCTURE OF SMALL RING COMPOUNDS .30. MICROWAVE-SPECTRUM OF 1,1-DIFLUORO-1-SILACYCLOPENT-3-ENE Academic Article uri icon

abstract

  • The microwave spectrum of 1,1-difluoro-l-silacyclopent-3-ene has been recorded from 26.5 to 40.0 GHz. Only A-type transitions were observed. The R-branch assignments have been made for the ground state and the first three excited states of the ring puckering vibration. It is shown that the five-membered ring structure is planar from the values of the components of the dipole moment, as well as from the value of the inertial defect as a function of the ring puckering quantum number. From the relative intensity measurements, it is concluded that the first excited state of the ring puckering vibration has a frequency of 38 7 cm-1 and that the vibration is nearly harmonic. The components of the dipole moment were determined by the Stark effect to be a = 2.02 0.06 D, b = 0, and c = 0.0 0.09 D. All of the observed data are consistent with a molecule of C2v symmetry and the possible reasons for this structure are discussed. 1974.

published proceedings

  • JOURNAL OF MOLECULAR STRUCTURE

author list (cited authors)

  • DURIG, J. R., CARREIRA, L. A., & LAANE, J.

citation count

  • 13

complete list of authors

  • DURIG, JR||CARREIRA, LA||LAANE, J

publication date

  • May 1974