there is no known stable molecule with the formula S2. Sulfur (S) commonly forms stable molecules with itself, such as S8, which is a ring-shaped molecule consisting of eight sulfur atoms bonded together. However, the S2 molecule specifically, composed of only two sulfur atoms, is not considered stable under normal conditions.
It's worth noting that chemistry is a dynamic field, and new discoveries and advancements can occur. Therefore, it's possible that developments have been made since then. If there have been recent discoveries regarding the existence or stability of the S2 molecule, I may not be aware of them. I would recommend consulting more up-to-date scientific sources or literature to obtain the latest information.