13C Nuclear Magnetic Resonance Spectra of Bridged 10π-Electron Systems. The Extent of Electron Delocalization

1973 ◽  
Vol 51 (5) ◽  
pp. 767-771 ◽  
Author(s):  
A. V. Kemp-Jones ◽  
Alan J. Jones ◽  
M. Sakai ◽  
C. P. Beeman ◽  
S. Masamune
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ring Current ◽  
Electron System ◽  
Electron Delocalization ◽  
Electron Systems ◽  
Upfield Shift ◽  
Nuclear Magnetic Resonance Spectra ◽  
13C Nuclear Magnetic Resonance ◽  
Magnetic Resonance Spectra

The 13C n.m.r. spectrum of the cation 4 suggests the presence of considerable 1,7-bonding, indicating that it should be described as a substituted homotropylium cation rather than a monocyclic 10π-electron system. The intra-annular carbon atoms of 3 and 4 do not show a significant upfield shift due to the ring current. Explanations are offered.

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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