Large Amplitude Motions in 2,3-Cyclopentenopyridine

Large amplitude motions in 2,3-cyclopentenopyridine have been investigated by microwave spectroscopy and ab initio calculations. The rotational spectra of the ground and of several low energy vibrational excited states have been assigned. The potential energy functions of the ring puckering and 1,3-ring-twisting motions have been obtained by applying a flexible model to the experimental data. Copyright 1997 Academic Press. Copyright 1997Academic Press