Knowledge Bank

Codeposition of $O2$ with the superheated vapors, of sulfur from a Knudson cell yields a new isomer of $S2O2$ in which both the $S2$ and $O2$ moieties are retained. The two bands, 1408 end 726 $cm-1$ are assigned to the 0-0 and S-S motions, respectively. Experiments with scrambled isotopes (O-16/O-18 and S-32/S-34) confirm the presence of the $S2$ and $O2$ fragments. In each case, a triplet of very narrow lines is obtained, suggesting that the vibrational coupling between the two fragments is minimal and/or that the two atoms in each fragment are equivalent. Upon phototosis $(\lambda >200nm)$, $S20$ and a perturbed (1347, 1147, and $519cm-1$) are obtained.