2024
DOI: 10.1021/acs.jpca.4c04599
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New Infrared Spectra of Acetylene-Water Dimers: First Determination of the A Rotational Constant and Another K-Dependent Anomaly

A. J. Barclay,
A. R. W. McKellar,
N. Moazzen-Ahmadi

Abstract: Infrared spectra of acetylene−water complexes are studied in the regions of the H 2 O ν 2 bend (1600 cm −1 ) and the D 2 O ν 1 /ν 3 stretches (2670− 2808 cm −1 ), using tunable infrared sources to probe a pulsed supersonic slit jet expansion. In the H 2 O bend region, there is a puzzling absence of K a = 0 transitions for C 2 H 2 −H 2 O, while both K a = 0 and 1 are observed for C 2 D 2 − H 2 O. This continues a pattern of "missing" K a states noted in previous infrared studies of acetylene-water. Noticeable l… Show more

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