The rotational spectrum and potential energy surface of ar-sio: An experimental investigation

McCarthy, Michael C.

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https://hdl.handle.net/2142/100536 Copy

Description

Title

The rotational spectrum and potential energy surface of ar-sio: An experimental investigation

Author(s)

McCarthy, Michael C.

Contributor(s)

Dawes, Richard

Issue Date

2018-06-22

Keyword(s)

Comparing theory and experiment

Abstract

The rotational spectra of five isotopic species of the Ar–SiO complex have been observed at high-spectral resolution between 8 and 18 GHz using chirped Fourier transform microwave spectroscopy and a discharge nozzle source; followup cavity measurements have extended these measurements to as high as 35 GHz. The spectra of the normal species is dominated by a strong progression of a-type rotational transitions arising from increasing quanta in the Si–O stretch. A rotational analysis of these lines and a hyperfine analysis of Ar–Si17O suggest that the complex is a highly fluxional prolate symmetric rotor with a vibrationally-averaged structure close to T-shaped in which the oxygen atom lies closer to argon than the silicon atom, much like Ar–CO. Newly performed calculations of the rovibrational level pattern are in good agreement with the experimentally-derived rotational constants of normal and isotopic Ar–SiO up to v=12 (∼14,500 cm−1 ) in the Si–O stretch suggesting that the present theoretical treatment well reproduces the salient properties of the intramolecular potential.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100536

DOI

10.15278/isms.2018.FC01

Copyright and License Information

Copyright 2018 Michael C. McCarthy

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