The amide bond stretch of cyclic cis-amides

I.r. and Raman spectra of substituted 2-pyrrolidinones have been run. Examination of these spectra and comparison of them with work on N-methyl 2-pyrrolidinone supports earlier conclusions that the amide bond stretching mode of cyclic cis-amides absorbs between 1500 and 1460 cm −1. The comparison of...

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Bibliographic Details
Published in:Spectrochimica acta. Part A : Molecular spectroscopy 1987, Vol.43 (4), p.587-588
Main Authors: DeProspo, Anne M., McDermott, Dana P., Byler, D.Michael
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Infrared spectra
Molecular properties and interactions with photons
Molecular spectra
Physics
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Summary:I.r. and Raman spectra of substituted 2-pyrrolidinones have been run. Examination of these spectra and comparison of them with work on N-methyl 2-pyrrolidinone supports earlier conclusions that the amide bond stretching mode of cyclic cis-amides absorbs between 1500 and 1460 cm −1. The comparison of spectra, along with MNDO calculations, suggests that alkyl substitution onto the ring carbon atom which is α to the ring nitrogen atom may leave the amide bond with a lesser degree of double bond character.
ISSN:0584-8539
DOI:10.1016/0584-8539(87)80064-8