RING PUCKERING AND CH STRETCHING SPECTRA .2. HIGH VIBRATIONAL-STATES OF GASEOUS MONOHYDROGENATED CYCLOPENTENE-3-H(1)

The excited vibrational states of gaseous cyclopentene 3-HC5D7 have be en measured up to Delta v = 7. The second overtone presents essentiall y two main absorptions corresponding to two distinct conformers. The h igher overtones are much perturbed by Fermi resonances with low-energy modes. The contribution of two types of couplings to the ring-puckeri ng motion and to isoenergetic states involving low-energy modes are an alyzed and modeled. Through the reconstruction of the spectra, the pre dominant pathways of the intramolecular vibrational redistribution of the energy (IVR) are discussed,