A sequence of photodimerization reactions of 1,5-diaryl-1,4-pentadien-3-ones have been carried out to produce 4,5,9,10-tetraaryl-tricyclo[6.2.0.03,6]decane-2,7-diones. The title compounds were characterized by means of infrared (IR), nuclear magnetic resonance (NMR) and mass spectrometric methods. The reaction proceeds via a diradical stepwise mechanism through the triplet excited state with asynchronous ring closure. Density functional theory calculations have been well established to probe the mechanism of photodimerization. The diradical mechanism for dimerization of chalcone proceeds via ring closure of the complex formed by two molecules.
Research on Chemical Intermediates – Springer Journals
Published: Jun 3, 2014
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