Round 3: Tossup 11

In 1998, Plass et al. observed a cyclic isomer of this molecule on the surface of magnesium oxide crystals. The MATCH technique measures the variation of this molecule, which is the heaviest one studied in halogen occultation experiments. An unspecified “third body” species, symbolized by the letter M, is generated alongside this molecule (10[1])in the Leighton relationship. (10[1])Photons with a wavelength lower than 330 nanometers break down this molecule in a null cycle. This molecule’s symmetry is preserved by absorption in the (10[1])Chappuis (“sha-PWEE”) band, but broken (10[3])by the (10[1])higher-energy (10[1])Hartley band. VOCs (10[1])react with nitrous oxides (10[1])or (10[1])this molecule to form (10[1])aerosols (10[2])that make (10[2])up photochemical smog. (-5[1])This molecule (-5[1])is regenerated in the Chapman (10[1])cycle. (10[2])For 10 points, Dobson units were developed to quantify (10[1])what molecule that was depleted by CFCs? (10[1])■END■

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