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 rs 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.
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