The Ņ3 and 2Ņ3 Bands of 32S16O3, 32S18O3, 34S16O3, and 34S18O3

Published

December 1, 2003

Author(s)

S W. Sharpe, Thomas A. Blake, R L. Sams, A G. Maki, Tony Masiello, J Barber, N Vulpanovici, J Nibler, A Weber

Abstract

The sixth of a series of publications on the high resolution rotation-vibration spectra of sulfur trioxide reports the results of a systematic study of the Ņ₃(e') and 2Ņ₃(A₁'+E') infrared bands of the four symmetric top isotopomers ³²S¹⁶O₃, ³²S¹⁸O₃, and ³⁴S¹⁸O₃. An internal coupling between the l = 0 and l = 2 levels of the 2Ņ₃ (A₁' +E') states was observed. This small perturbation results in a level crossing between 1k-l1 = 9 and 12, in consequence of which the band origins of the A_1', l =0 ghost states could be determined to a high degree of accuracy. Ground and upper state rotational constants as well as vibrational anharmonicity constants are reported. The constants for the center-of-mass subsitituted species ³²S¹⁶O₃ and ³⁴S¹⁶O₃ vary only slightly, as do the constants for the ³²S¹⁸O₃ pair. The S-O bond lengths for the vibrational ground states of the species ³²S¹⁶O₃ and ³⁴S¹⁸O₃, are, respectively141.98199(2), 141.97939(6), 141.97275(16), and 141.97000 (12) pm, where the uncertainties, given in parentheses, are two standard deviations and refer to the last digits of the associated quantity.

Citation

Journal of Molecular Spectroscopy

Volume

222

Issue

No. 2

Pub Type

Journals

Keywords

high resolution, infrared, isotopomers, sulfur troxide, symmetric

Citation

Sharpe, S. , Blake, T. , Sams, R. , Maki, A. , Masiello, T. , Barber, J. , Vulpanovici, N. , Nibler, J. and Weber, A. (2003), The Ņ₃ and 2Ņ₃ Bands of ³²S¹⁶O₃, ³²S¹⁸O₃, ³⁴S¹⁶O₃, and ³⁴S¹⁸O₃, Journal of Molecular Spectroscopy (Accessed November 8, 2024)