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dc.creatorAndrade, Laize A. F.-
dc.creatorSilla, Josué M.-
dc.creatorCormanich, Rodrigo A.-
dc.creatorFreitas, Matheus P.-
dc.identifier.citationANDRADE, L. A. F. et al. Infrared Fingerprints of nN → σ*NH Hyperconjugation in Hydrazides. American Chemical Society, Easton, v. 82, n. 23, p. 12181-12187, 2017.pt_BR
dc.description.abstractAn earlier study demonstrated that hyperconjugation operates in hydrazides by analyzing the N–H stretching mode in gas phase infrared (IR) spectroscopy, and then observing two very distinct bands corresponding to isolated isomers experiencing or not the nN → σ*N–H electron delocalization. The present work reports a chemical method to obtain insight on the hyperconjugation in hydrazide derivatives from solution IR spectroscopy. The analogous amides did not show a νN–H red-shifted band, as the electron donor orbital in the above hyperconjugative interaction does not exist. In addition, the effect of electron withdrawing groups bonded to a nitrogen atom, namely the trifluoroacetyl and the methanesulfonyl groups, was analyzed on the conformational isomerism and on the ability to induce a stronger hyperconjugation in the resulting compounds.pt_BR
dc.publisherACS Publicationspt_BR
dc.sourceAmerican Chemical Societypt_BR
dc.subjectInfrared spectroscopypt_BR
dc.subjectInfrared fingerprintspt_BR
dc.subjectEspectroscopia de infravermelhopt_BR
dc.subjectImpressões digitais infravermelhaspt_BR
dc.titleInfrared Fingerprints of nN → σ*NH Hyperconjugation in Hydrazidespt_BR
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