Photodimerization Mechanism of Bis(3,4,5-trifluorobenzyl) (E,E)-Muconate in a Columnar Assembly in the Crystalline State
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We have revealed the photoreaction mechanism for the single-crystal-to-single-crystal transformation of bis(3,4,5-trifluorobenzyl) (<I>E</I>,<I>E</I>)-muconate (<B>1</B>) to the corresponding dimer. The [2 + 2] photodimerization randomly occurred in the columnar assembly of monomer molecules in the crystals of <B>1</B>, followed by the formation of a trimer. The photoreaction was directly monitored by an X-ray single crystal structure analysis as well as the product analysis by NMR and MS spectroscopies.
- Chemistry Letters
Chemistry Letters 36(4), 510-511, 2007-04-05
The Chemical Society of Japan