Cyclization Reactions Of Acylium And Thioacylium Ions With Isocyanates And Isothiocyanates: Gas Phase Synthesis Of 3,4-dihydro-2,4-dioxo-2h-1,3,5- Oxadiazinium Ions

dc.creatorMeurer E.C.
dc.creatorSparrapan R.
dc.creatorTomazela D.M.
dc.creatorEberlin M.N.
dc.creatorAugusti R.
dc.date2005
dc.date2015-06-26T14:08:12Z
dc.date2015-11-26T14:07:48Z
dc.date2015-06-26T14:08:12Z
dc.date2015-11-26T14:07:48Z
dc.date.accessioned2018-03-28T21:08:24Z
dc.date.available2018-03-28T21:08:24Z
dc.identifier
dc.identifierJournal Of The American Society For Mass Spectrometry. , v. 16, n. 10, p. 1602 - 1607, 2005.
dc.identifier10440305
dc.identifier10.1016/j.jasms.2005.05.011
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-25144431787&partnerID=40&md5=e489347153f948b119355f8db647d1df
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/93517
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/93517
dc.identifier2-s2.0-25144431787
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1240854
dc.descriptionGas-phase reactions of several acylium and thioacylium ions, that is H 2C=N-C+=O, H2C=N-C+=S, O=C=N-C +=O, S=C=N-C+=O, H3C-C+=O, and (CH3)2N-C+=O, with both a model isocyanate and isothiocyanate, that is, C2H5-N=C=O and C 2H5-N=C=S, were investigated using tandem-in-space pentaquadrupole mass spectrometry. In these reactions, the formation of mono- and double-addition products is observed concurrently with proton transfer products. The double-addition products are far more favored in reactions with ethyl isocyanate, whereas the reactions with ethyl isothiocyanate form, preferentially, either the mono-addition product or proton transfer products, or both. Retro-addition dominates the low-energy collision-induced dissociation of the mono- and double-addition products with reformation of the corresponding reactant ions. Ab initio calculations at Becke3LYP//6-311 + G(d,p) level indicate that cyclization is favored for the double-addition products and that products equivalent to those synthesized in solution, that is, of 3,4-dihydro-2,4-dioxo-2H-1,3,5-oxadiazinium ions and sulfur analogs, are formed. © 2005 American Society for Mass Spectrometry.
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dc.languageen
dc.publisher
dc.relationJournal of the American Society for Mass Spectrometry
dc.rightsfechado
dc.sourceScopus
dc.titleCyclization Reactions Of Acylium And Thioacylium Ions With Isocyanates And Isothiocyanates: Gas Phase Synthesis Of 3,4-dihydro-2,4-dioxo-2h-1,3,5- Oxadiazinium Ions
dc.typeArtículos de revistas


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