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Photoinduced electron transfer variables: rigidity or orientation?
Authors:D.G. Seapy   S.S.H. Al-Mahmoodi   N.M.M. Al-Belushi  F.A.M. Al-Mjeni
Affiliation:

Department of Chemistry, Sultan Qaboos University, PO Box 36, Al-Khod 123, Muscat Oman

Abstract:The relatives photoreactives of bridged-ring systems 1, 3, 5-X and 6-X (X ≡ Cl or Br) have been studied at 254 nm in acetic acid. The formation of photosolvolysis product was rationalized in terms of photoinduced intramolecular electron transfer (ET) processes. The relative ease of ET in these donor—bridge—acceptor model system was analyzed in terms of known ET variables including free-energy changes, orientation effects and ridigity effects. The observed relative photoreactivities agreed better with the calculated free-energy changes when relative rigidities of the electron acceptor termini were evaluated. In general, the more rigid system were more photoreactive.
Keywords:
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