Measurement and revised analysis of the torsional combination band of the nonpolar N2O dimer at 2249 cm(-1) |
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Authors: | Dehghany M Afshari Mahin Moazzen-Ahmadi N McKellar A R W |
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Institution: | Department of Physics and Astronomy, University of Calgary, 2500 University Drive, Calgary, Alberta, CanadaT2N 1N4. |
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Abstract: | The high-resolution infrared spectrum of the weakly-bound dimer (N(2)O)(2) is studied using a rapid-scan tunable-diode laser spectrometer to probe a pulsed supersonic jet expansion. An observed band with c-type rotational structure is assigned as a combination of the intramolecular N(2)O nu(1) stretching vibration and the intermolecular out-of-plane dimer torsional vibration, with a vibrational origin at 2249.360 cm(-1). The resulting torsional frequency for the nonpolar N(2)O dimer is about 21.5 cm(-1). The present rotational analysis is completely different from that reported previously for the same band Hecker et al., Phys. Chem. Chem. Phys., 2003, 5, 2333], which gave a band origin some 1.53 cm(-1) lower. |
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