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Photoisomerization of 5-Membered Heterocycles

dc.creatorTorres, M.
dc.creatorConstenla Umaña, Manuel Arturo
dc.creatorClement, A.
dc.creatorStrausz, Otto P.
dc.date.accessioned2024-03-06T17:04:50Z
dc.date.available2024-03-06T17:04:50Z
dc.date.issued1987-06-07
dc.description.abstractPhotolysis of substituted furans, thiophenes, and pyrroles resulted in positional isomerization as a consequence of the scrambling of the ring carbon atoms, Two intermediates have been proposed for this photoisomerization, namely, the Dewar form (1), and the ring contracted form (2). Recently, we confirmed the formation of both intermediates in the case of the parent furan, thiophene, and pyrrole by a combination of solution phase photolysis-trapping and low-temperature matrix photolysis-FTIR experiments. As the next step, we have now carried out similar photolysis of selected deuterium-labeled furan and thiophene in an effort to determine the symmetry of the reaction path leading to (1) and (2). Deuterium was chosen in order to minimize the electronic and steric effects of the substituent. The observed scrambling of the deuterium label in (1) and (2) indicates that photoisomerization takes place prior to their formation.es_ES
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Químicaes_ES
dc.description.sponsorshipUniversity of Alberta, Department of Chemistry///Canadaes_ES
dc.description.sponsorshipUniversidad de Costa Rica//UCR/Costa Ricaes_ES
dc.description.sponsorshipNational Science and Engineering Research Council///Canadaes_ES
dc.identifier.urihttps://hdl.handle.net/10669/91038
dc.language.isoenges_ES
dc.rightsCC0 1.0 Universal*
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/*
dc.source70th Canadian Chemical Conference. Québec, Canadáes_ES
dc.subjectPhotochemistryes_ES
dc.subjectPhotoisomerizationes_ES
dc.subjectFuranses_ES
dc.subjectThiopheneses_ES
dc.subjectPyrroleses_ES
dc.subjectDewar formses_ES
dc.subjectRing contracted formses_ES
dc.subjectIntermediateses_ES
dc.titlePhotoisomerization of 5-Membered Heterocycleses_ES
dc.typecomunicación de congresoes_ES

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