Laboratory astrochemistry reveals the formation of sulfinothioic acid in irradiated interstellar ice analogs, highlighting unexplored sulfur-oxygen pathways in deep space.
Interstellar grains doped with sulfur dioxide illustrate reactions within molecular clouds and pave the way for unique sulfur-oxygen chemistry. In the Communication e8731327, Ryan Fortenberry, Ralf I. Kaiser, and co-workers identify sulfinothioic acid (HS(O)SH) by isomer-selective photoionization mass spectrometry of irradiated sulfur dioxide-water ices, linking unexplored sulfur bonding with the molecular complexity harbored in cosmic nurseries.
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McAnally et al. (2026) studied this question.
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