Infrared spectra of the polar and nonpolar N2O dimers in the 1280 cm region of the ν3 fundamental |
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| Authors: | M Dehghany RI Thompson ARW McKellar |
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| Institution: | a Department of Physics and Astronomy, University of Calgary, 2500 University Drive North West, Calgary, Alta. Canada T2N 1N4
b The Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ont. Canada K1A 0R6 |
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| Abstract: | The high-resolution infrared spectrum of the polar N2O dimer has been observed in the region of the N2O ν3 fundamental (∼1280 cm−1) using a tunable diode laser to probe a pulsed supersonic slit jet. About 120 rotational transitions were assigned in terms of an a/b hybrid band of a planar asymmetric top molecule with a slipped parallel structure. The vibrational origin was determined to be 1290.21 cm−1, showing a blue shift of 5.31 cm−1 with respect to the monomer band origin. In addition, the spectrum of the nonpolar isomer at 1279.71 cm−1 has been remeasured and analyzed in improved detail. Small but widespread perturbations are noted in this band, which appear somewhat similar to larger effects observed previously in the ν1 + ν3 region for nonpolar (N2O)2. |
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| Keywords: | Dimer Nitrous oxide Infrared Supersonic jet |
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