Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/17940
DC FieldValueLanguage
dc.contributor.authorReva, Igor-
dc.contributor.authorNowak, Maciej J.-
dc.contributor.authorLapinski, Leszek-
dc.contributor.authorFausto, Rui-
dc.date.accessioned2011-12-15T17:23:18Z-
dc.date.available2011-12-15T17:23:18Z-
dc.date.issued2008-02-
dc.identifier.urihttp://hdl.handle.net/10316/17940-
dc.description.abstractPhotochemical transformations of methyl 2-pyrone-3-carboxylate (mp3c) were studied by matrix-isolation technique. The dominating primary photoreaction induced by UV (λ > 295 nm) light was α-bond cleavage leading to open-ring aldehyde–ketene. Another reaction characteristic of α-pyrones, isomerisation to the Dewar form, did not occur for mp3c. The ring-opening photoreaction was followed by intramolecular hydrogen shift and subsequent ring-closure reaction converting the aldehyde–ketene into methyl 2-pyrone-5-carboxylate (mp5c). Upon prolonged UV irradiation, mp3c completely transformed into mp5c and its Dewar isomer Dmp5c. Unequivocal identification of mp5c and Dmp5c photoproducts was enabled by exact knowledge of their experimental IR spectra, recorded in separate experiments.por
dc.language.isoengpor
dc.publisherElsevierpor
dc.rightsopenAccesspor
dc.titlePhotoinduced transformation of matrix-isolated methyl 2-pyrone-3-carboxylate into methyl 2-pyrone-5-carboxylate via intramolecular hydrogen shift in open-ring aldehyde–ketenepor
dc.typearticlepor
degois.publication.firstPage20por
degois.publication.lastPage28por
degois.publication.titleChemical Physics Letterspor
dc.peerreviewedYespor
dc.identifier.doi10.1016/j.cplett.2007.12.027-
degois.publication.volume452por
item.fulltextCom Texto completo-
item.grantfulltextopen-
item.languageiso639-1en-
crisitem.author.deptFaculdade de Ciências e Tecnologia, Universidade de Coimbra-
crisitem.author.parentdeptUniversidade de Coimbra-
crisitem.author.researchunitCoimbra Chemistry Center-
crisitem.author.orcid0000-0002-8264-6854-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
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