Millimeter-Wave Spectroscopy of Sulfur Dichloride

Author： Bizzocchi L. Cludi L. Degli Esposti C. Giorgi A.

ISSN： 0022-2852

Source： Journal of Molecular Spectroscopy, Vol.204, Iss.2, 2000-12, pp. : 275-280

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Abstract

The rotational spectra of ³²S³⁵Cl₂, ³²S³⁵Cl³⁷Cl, ³²S³⁷Cl₂, and ³⁴S³⁵Cl₂ in their ground vibrational states, as well as those of ³²S³⁵Cl₂ and ³²S³⁵Cl³⁷Cl in their ν₂ and 2ν₂ excited states, have been studied in selected frequency regions between 100 and 370 GHz. Transitions involving a large range of quantum numbers have been observed, so that precise rotational and quartic centrifugal distortion constants could be determined for each of the spectra investigated. The complete set of sextic distortion constants was also obtained for the most abundant isotopomer in its ground vibrational state. The newly determined rotational constants of ³⁴S³⁵Cl₂ and ³²S³⁷Cl₂ allowed us to calculate the complete r_s structure of sulfur dichloride using both single- and double-isotopic substitution methods. The quadratic force field has been refined using a larger set of quartic distortion constants and inertial defects.