Moorthy, Jarugu Narasimha and Venkatesan, Kailasam (1994) Photobehavior of crystalline 4-styrylcoumarin dimorphs: structure-reactivity correlations. In: Bulletin of the Chemical Society of Japan, 67 (1). pp. 1-6.Full text not available from this repository.
4-Styrylcoumarin crystallizes from chloroform and hexane mixture in two morphologically different modifications. The monoclinic form (needles, P2(1)/c) undergoes stereospecific photodimerization producing anti head-to-tail dimer across pyrone double bond, whereas the triclinic modification (prisms, P ($) over bar 1) dimerizes yielding photodimer of the same configuration, but across styrenic double bond. Single crystal X-ray analyses of the dimorphs reveal the packing differences permitting rationalization of the regio- and stereochemistry of the photoproducts. The significantly low dimer yield from the prismatic crystals is rationalized.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Chemical society of japan.|
|Department/Centre:||Division of Chemical Sciences > Organic Chemistry|
|Date Deposited:||08 Apr 2011 10:15|
|Last Modified:||08 Apr 2011 10:15|
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