Dynamic nuclear magnetic resonance studies on complex spin systems. Degenerate valence isomerization of a 3,4-diazanorcaradiene

1970 ◽  
Vol 92 (12) ◽  
pp. 3787-3789 ◽  
Author(s):  
Daniel A. Kleier ◽  
Gerhard. Binsch ◽  
Alois. Steigel ◽  
Juergen. Sauer
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spin Systems ◽  
Valence Isomerization ◽  
Magnetic Resonance Studies ◽  
Complex Spin ◽  
Dynamic Nuclear Magnetic Resonance ◽  
Nuclear Magnetic

Nuclear magnetic resonance studies. XI. Vinyl proton chemical shifts and coupling constants of some substituted styrenes

1967 ◽  
Vol 45 (7) ◽  
pp. 731-737 ◽  
Author(s):  
Gurudata ◽  
J. B. Stothers ◽  
J. D. Talman
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Chemical Shifts ◽  
Spin Systems ◽  
Coupling Constants ◽  
Vinyl Proton ◽  
Magnetic Resonance Studies ◽  
Vinyl Carbon ◽  
Proton Chemical Shifts ◽  
Nuclear Magnetic

The proton spectra of the vinyl groups in a series of 23 substituted styrenes have been analyzed as ABC spin systems. The proton chemical shifts are compared with the previously reported shielding data for the corresponding vinyl carbon nuclei. The series includes 12 meta- and para-substituted examples and 10 ortho-substituted examples. The effects of steric inhibition of conjugation on the vinyl proton parameters for some 2,6-disubstituted derivatives are considered in detail.

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