Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/5044
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dc.contributor.authorGómez-Zavaglia, Andrea-
dc.contributor.authorKaczor, Agnieszka-
dc.contributor.authorCardoso, Ana L.-
dc.contributor.authorMelo, Teresa M. V. D. Pinho e-
dc.contributor.authorFausto, Rui-
dc.date.accessioned2008-09-01T15:02:59Z-
dc.date.available2008-09-01T15:02:59Z-
dc.date.issued2007en_US
dc.identifier.citationJournal of Molecular Structure. 834-836:(2007) 262-269en_US
dc.identifier.urihttp://hdl.handle.net/10316/5044-
dc.description.abstractIn this study, the UV induced photochemical reactions of two 2H-azirines - methyl 2-chloro-3-methyl-2H-azirine-2-carboxylate (MCMAC) and methyl 3-methyl-2H-azirine-2-carboxylate (MMAC) - isolated in argon matrices are compared. For both compounds, irradiation with [lambda] > 235 nm led to observation of two primary photoprocesses: (a) CC bond cleavage, with production of nitrile ylides (P1-type products), and (b) CN bond cleavage, with production of methylated ketene imines (P2-type products). However, subsequent photoprocesses were found to be different in the two cases. In MCMAC, both primary photoproducts were shown to undergo further reactions: P1-type products decarboxylate, giving [(1-chloroethylidene)imino]ethanide, which bears a CN+C- group (P3-type product); P2-type products decarbonylate, yielding a substituted ylidene methanamine (P4-type product). In MMAC, only P2-type primary photoproducts appeared to react, undergoing decarbonylation or decarboxylation (both reactions leading to P4-type products), whereas P1-type products were found to be non-reactive. The non-observation of any secondary photoproduct resulting from photolysis of P1-MMAC revealed the higher photostability of this species when compared with the corresponding photoproduct obtained from MCMAC.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TGS-4MSXTBJ-2/1/00b194a96da3576f4b463ba673a96d28en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subject2H-azirinesen_US
dc.subjectPhotolysisen_US
dc.subjectMatrix isolation FTIR spectroscopyen_US
dc.subjectSubstituent effectsen_US
dc.titleSubstituent effects on the photolysis of methyl 2-carboxylate substituted aliphatic 2H-azirinesen_US
dc.typearticleen_US
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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