Add time:09/24/2019 Source:sciencedirect.com
The symmetrical octafluoro stilbene trans-1,2-bis(2,3,5,6-tetrafluorophenyl)ethylene (1) undergoes a stereoselective and quantitative [2 + 2] photodimerization in the solid state. The olefin self-assembles via C-H⋯F and face-to-face interactions of the fluorinated phenyl rings into a geometry for a topochemical photodimerization. The crystal structure and stereochemistry of the photoproduct rctt-1,2,3,4-tetrakis(2,3,5,6-tetrafluorophenyl)cyclobutane (2) has been determined.
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