MICROWAVE SPECTRA AND STRUCTURE OP $S_{2}F_{2}^{*}$

$^{*}$The research was made possible by support extended Harvard University by the Office of Naval Research under ONR Contract Nonr 1866, Task Order XIV.Author Institution: Department of Chemistry, Harvard University“By employing mass spectroscopy, low temperature distillation and microwave spectroscopy, one component of the mixture of gases generated by heating AgF and sulfur has been identified as $S_{2}F_{2}$ with structure analogous to thionyl fluoride $(SOF_{2})$. The relative mass spectral cracking pattern found for $S_{2}^{32}F_{2}$ was $S_{2} F_{2}{^{+}} = 100; S_{2} F{^{+}} = 30.2;\ SF_{2}{^{+}} = 7.4;\ S_{2}{^{+}} = 23.2;\; SF{^{+}} (S_{2} F_{2}{^{++}}) = 6.6;\ S{^{+}} (S_{2}{^{++}})= 26.6;\ F{^{+}} = 2.6;\ S_{2} F{^{++}}\sim 0.6;\ SF_{2}{^{++}} < 0.1.$. Three sulfur isotope species were identified in the microwave spectra. Strong \emph{c} dipole transitions and weak \emph{a} dipole transitions were observed. The rotational constants are: [FIGURE] The structural parametrs are $d(S = S) = 1.86 \pm 0.03${\AA}; $d(S - F) = 1.59 \pm 0.03${\AA}; $\angle FSF = 92^{\circ} \pm 1^{\circ};\;\angle SSF = 108.5^{\circ} \pm 1.5^{\circ}$. Evidence for the existence of another molecule with empirical formula $S_{2}F_{2}$ will be discussed.