5314027795

POSTER SESSION. H7

INVESTIGATION OF THE RING PUCKERING HOT BANDS OF OX-ETANE BY THE RITZ PROGRAM

GIOVANNI MORUZZI. Dipartimento di Fisica deWUnwersitd di Pisa and INFM, Piazza Torricelli 2, 1-56126 Pisa, Italy, MARC KUNZMANN, BRENDA P. WINNEWISSER and MANFRED WINNEWISSER, Physikalisch-Chemisches Institut, Justus-Liebig-Universitat, Heinrich-Buff-Ring 58, D-35392 Giejlen, Germany.

In the recent past the ^Mmulti-molecule’‘ Ritz program has proved to be a very valuab!e tool for assignłng complex Fourier-transform spectra of medium-sizc molecules with large-amplitudc motions and strong perturbation couplings. After assigning somc 70000 lines of various methanol isotopomers the Ritz program has assigned about 16000 lines of cyanamide and madę the spectrum of this inolocule accessible for further analysis. In this work we present the first application of the Ritz program to a nearly-oblate molecule: oxetane (C3H6O). Using the existing assignments of the fundamenta! and first hot bands of the ring puckering modę as a starting point⁰, the program has easily assigned the higher hot bands found in the 52 - 162 cm^-1 Fourier-transform spectrum raeasured on the Broker spectrometer at Giefien.

“M. Winnewisser, M. Kunzrnann and M. Lock, “High Resolution FIR-Spectrum of Oxetane (Trimethylene Oxide): Analysis of the Ring-Puckering Fundamenta! Near 53 cm^-1 and of Some Hot Bands”, 53rd Ohio State University International Symposium on Molecular Spectroscopy, Columbus, June 15 19, 1998, TD04