A pair of photoreactive polymorphic co-crystals that undergo a regioselective solid-state [2 + 2] cycloaddition reaction that yields exclusively the head-to-tail photoproduct is reported. Click to show full abstract
A pair of photoreactive polymorphic co-crystals that undergo a regioselective solid-state [2 + 2] cycloaddition reaction that yields exclusively the head-to-tail photoproduct is reported.
               
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