J. NOROOZ OLIAEE, N. MOAZZEN-AHMADI, Department of Physics and Astronomy, University of Calgary, 2500 University Dr., N.W., Calgary, Alberta T2N 1N4, Canada; A. R. W. MCKELLAR, National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canada.
Infrared spectra of the (CO2)2-N2O trimer are observed by exciting the 1 and 3 fundamental stretching vibrations of the N2O moiety (around 1285 cm-1 and 2224 cm-1 respectively). Spectra are recorded using a pulsed supersonic jet apparatus with a tunable diode laser probe. Ground state parameters were previously determined from a microwave study. Analysis of the infrared spectra reveals information on the vibrational shifts upon complex formation as well as molecular parameters for the excited states. Our cluster calculation program yields a minimum energy structure very similar to that from the Orient program\textsuperscript a but in slightly better agreement with the experimental structure. Our cluster calculations indicate a close resemblance of the two lowest energy isomers to those of (CO2)2-OCS.