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

1980 ◽  
Vol 58 (9) ◽  
pp. 928-931 ◽  
Author(s):  
Pierre L. Beaulieu ◽  
Veronique M. Morisset ◽  
Dennis G. Garratt
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Substituent Effects ◽  
Methyl Carbon ◽  
Substituent Group ◽  
Nuclear Magnetic Resonance Spectra ◽  
13C Nuclear Magnetic Resonance ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

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 sp2 carbon of the allene. A mechanism based upon the transmission of substituent effects from the remote substituents to the collinear π orbitals is proposed.

13C Nuclear Magnetic Resonance Spectra of Natural Undiluted Lipids:  Docosahexaenoic-Rich Phospholipid and Triacylglycerol from Fish

2004 ◽  
Vol 52 (13) ◽  
pp. 4250-4255 ◽  
Author(s):  
C. Leigh Broadhurst ◽  
Walter F. Schmidt ◽  
Michael A. Crawford ◽  
Yiqun Wang ◽  
Rong Li
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
13C Nuclear Magnetic Resonance ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

13C-nuclear magnetic resonance spectra of compounds containing β-D-fructofuranosyl groups or residues

1979 ◽  
Vol 72 ◽  
pp. 57-69 ◽  
Author(s):  
Fred R. Seymour ◽  
Roger D. Knapp ◽  
Judith E. Zweig ◽  
Stephen H. Bishop
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
13C Nuclear Magnetic Resonance ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic
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