Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/17946
DC FieldValueLanguage
dc.contributor.authorKaczor, A.-
dc.contributor.authorProniewicz, L. M.-
dc.contributor.authorAlmeida, R.-
dc.contributor.authorGómez-Zavaglia, A.-
dc.contributor.authorCristiano, M. L. S.-
dc.contributor.authorBeja, A. M. Matos-
dc.contributor.authorSilva, M. Ramos-
dc.contributor.authorFausto, R.-
dc.date.accessioned2011-12-16T13:23:18Z-
dc.date.available2011-12-16T13:23:18Z-
dc.date.issued2008-06-
dc.identifier.urihttp://hdl.handle.net/10316/17946-
dc.description.abstractThe thermal Chapman-type rearrangement of the pseudosaccharin 3-(methoxy)-1,2-benzisothiazole 1,1-dioxide (MBID) into 2-methyl-1,2-benzisothiazol-3(2H)-one 1,1-dioxide (MBIOD) was investigated on the basis of computational models and knowledge of the structure of the reactant and product in the isolated and solid phases. X-ray diffraction was used to obtain the structure of the substrate in the crystalline phase, providing fundamental structural data for the development of the theoretical models used to investigate the reaction mechanism in the condensed phase. The intra- and different intermolecular mechanisms were compared on energetic grounds, based on the various developed theoretical models of the rearrangement reactions. The energetic preference (ca. 3.2 kJ mol−1, B3LYP/6-31+G(d,p)) of inter- over intramolecular transfer of the methyl group is predicted for the “quasi-simultaneous” transfer of the methyl groups model, explaining the potential of MBID towards [1,3′]-isomerization to MBIOD in the condensed phases. The predicted lower energy of MBIOD relative to MBID (ca. 60 kJ mol−1), due to the lower steric hindrance in the MBIOD molecule, acts as a molecular motor for the observed thermal rearrangement.por
dc.language.isoengpor
dc.publisherElsevierpor
dc.rightsopenAccesspor
dc.titleThe Chapman-type rearrangement in pseudosaccharins: The case of 3-(methoxy)-1,2-benzisothiazole 1,1-dioxidepor
dc.typearticlepor
degois.publication.firstPage343por
degois.publication.lastPage352por
degois.publication.titleJournal of Molecular Structurepor
dc.peerreviewedYespor
dc.identifier.doi10.1016/j.molstruc.2008.05.054-
degois.publication.volume892por
uc.controloAutoridadeSim-
item.fulltextCom Texto completo-
item.grantfulltextopen-
item.languageiso639-1en-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0002-8705-0160-
crisitem.author.orcid0000-0002-8264-6854-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
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