Axial dissymmetry induced magnetic nonequivalence in the 13 C nuclear magnetic resonance spectra of allenes

The observation of the magnetic nonequivalence of isopropyl methyl carbon resonances as a result of axial dissymmetry in 27 appropriately substituted allenes is reported. The magnitude of the nonequivalence Δ is more dependent upon the adjacent substituent group than upon the substituents which are...

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Bibliographic Details
Published inCanadian journal of chemistry Vol. 58; no. 9; pp. 928 - 931
Main Authors Beaulieu, Pierre L., Morisset, Veronique M., Garratt, Dennis G.
Format Journal Article
LanguageEnglish
Published 01.05.1980
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Summary:The observation of the magnetic nonequivalence of isopropyl methyl carbon resonances as a result of axial dissymmetry in 27 appropriately substituted allenes is reported. The magnitude of the nonequivalence Δ is more dependent upon the adjacent substituent group than upon the substituents which are bonded to the remote sp 2 carbon of the allene. A mechanism based upon the transmission of substituent effects from the remote substituents to the collinear π orbitals is proposed.
ISSN:0008-4042
1480-3291
DOI:10.1139/v80-146