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



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


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 A1', 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.
Journal of Molecular Spectroscopy
No. 2


high resolution, infrared, isotopomers, sulfur troxide, symmetric


Sharpe, S. , Blake, T. , Sams, R. , Maki, A. , Masiello, T. , Barber, J. , Vulpanovici, N. , Nibler, J. and Weber, A. (2003), The &#325;<sub>3</sub> and 2&#325;<sub>3</sub> Bands of <sup>32</sup>S<sup>16</sup>O<sub>3</sub>, <sup>32</sup>S<sup>18</sup>O<sub>3</sub>, <sup>34</sup>S<sup>16</sup>O<sub>3</sub>, and <sup>34</sup>S<sup>18</sup>O<sub>3</sub>, Journal of Molecular Spectroscopy (Accessed February 26, 2024)
Created December 1, 2003, Updated February 17, 2017