Abstract
N2O clusters in a supersonic jet were isolated in a low-temperature argon matrix. The infrared bands of the clusters were assigned with the aid of the results of density functional theory (DFT) calculation where the 6-31+G∗ basis set is used to optimize geometrical structures. It is concluded that the N⋯O interacting antiparallel conformer is the most stable dimer. This result supports the high-resolution infrared spectroscopic study of Huang and Miller [J. Chem. Phys. 89 (1988) 5408], but disagrees with the recent matrix-isolation study of Nxumalo and Ford [J. Mol. Struct. 327 (1994) 145]. The observed dependence of cluster formation on stagnation pressure is used to examine the cooling effect on supersonic expansion.
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