| ORIGINAL ARTICLE | |
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Photolysis of some 2-butenyl/butynylbischromones: Effect of solvent polarity Rupesh Kumar and Mohamad Yusuf Org. Commun. (2009), 2:1; 7-19 Department of Chemistry, Punjabi University, Patiala-147002, India Abstract: Photochemistry of some 2-butenyl/butynyl-bischromones has been investigated in benzene and isopropanol-THF (1:1). The photoreactions are initiated through the intramolecular H-abstraction that leads to the formation of tetracyclic derivatives and vinyl bischromones. Photolytic conversion of the bischromones is found to be dependent upon the nature of the intermediate spacer and H-donating capability of the solvent. Keywords : 1,4-biradicals; bischromones; chromophores; photolytic conversion; intermediate spacer. |