Iodine photocatalyzed cis ? trans isomerization of 3-styrylpyridine. Role of charge transfer complex
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Transactions of the Faraday Society
- Vol. 65, 816-819
- https://doi.org/10.1039/tf9696500816
Abstract
The iodine photocatalyzed cis → trans isomerization of 3-styrylpyridine has been investigated in n-hexane at 25°C by irradiation at 408, and 478 nm where the free and complexed iodine absorb competitively. The mechanism of the free and complexed iodine photocatalysis is the same, the charge-transfer complex with styrylpyridine dissociating to give two iodine atoms with a lower yield (φ478= 0.2) than molecular iodine (φ478= 0.5). Some experiments with stilbene gave similar results. The mechanism is discussed with respect to that reported for stilbene.Keywords
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