Browsing by Author "Barclay, Aaron"

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    Mid Infrared Investigation of Two Isomers of the CO-N2O van der Waals Complex
    (2017) Barclay, Aaron; Moazzen-Ahmadi, Nasser; Heyne, Belinda Josiane M.; Thompson, Robert Ian; Jackel, Brian
    Infrared spectra in the carbon monoxide CO stretch region (~2150 cm−1) and in the nu3 asymmetric stretch region of N2O (~2223 cm−1) are assigned to the previously unobserved O-bonded form of the CO-N2O dimer (“isomer 2”). This van der Waals complex has a planar skewed T-shaped structure like that of the previously observed C-bonded form (“isomer 1”), but with the CO rotated by 180°. In addition to the fundamental band, combination bands for both isomers are observed and intermolecular frequencies for the out of plane torsion and the in-plane CO-rock, or disrotatory bend are reported. Vibrational assignment of these bands is achieved by comparison with data recently published (A. Barclay et al., Chem. Phys. Letters, 651 (2016) 62), concerning OC-CO2. We show that the most recent ab initio potential energy surface is inadequate in predicting the intermolecular frequencies for both isomers (CO-N2O and OC-N2O).