Knowledge Bank

The pure rotational spectrum of sulfuryl chloride fluoride. $SO2CIF$: has been investigated in the frequency range 5.6 - 24.0 GHz using a pulsed molecular-beam microwave Fourier transform spectrometer. Between 48 and 150 lines of 8 to 25 rotational transitions have been observed for the six isotopomers $SO2CIF,SO237CIF,34SO237CIF,34SO237CIF,SO18OCIF$, and $SO18O37CIF$ (unlabeled atoms indicate $\mathrm{<mrow\; data-mjx-texclass="ORD">16</mrow>}O,19F,32Sand35Cl))$ in natural isotopic abundance. The rotational and quartic centrifugal distortion constants have been determined. $r0r\Delta p$, and $r8$-type structural parameters have been evaluated. A harmonic force field has been calculated in order to derive ground stale average and estimated equilibrium bond lengths. Chlorine and fluorine hypertine structures have been resolved, allowing quadrupole coupling (including $\chi bc$ for the isotopomers containing $\mathrm{<mrow\; data-mjx-texclass="ORD">18</mrow>}O$) and spin-rotation constants to be determined. Variations of the chlorine quadrupole coupling constants with different isotopomers have allowed the quadrupole tensor to be diagonalized, and indicate $\chi zz$ to coincide with the SCI band.