Comparisons of the Carbon-13 Nuclear Magnetic Resonance Spectra of Some Solid cis- and trans-Polyisoprenes

1972 ◽  
Vol 5 (4) ◽  
pp. 427-440 ◽  
Author(s):  
Jacob Schaefer
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
Cis And Trans ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The nuclear magnetic resonance spectra and stereochemistry of 4-Benzoyloxy-1-thiaflavans

1967 ◽  
Vol 20 (10) ◽  
pp. 2235 ◽  
Author(s):  
GF Katekar ◽  
AG Moritz
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Double Resonance ◽  
Heterocyclic Ring ◽  
Coupling Constants ◽  
Spectral Parameters ◽  
Nuclear Magnetic Resonance Spectra ◽  
Cis And Trans ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The nuclear magnetic resonance spectra of cis- and trans-4-benzoyloxy- 1-thiaflavan in deuterochloroform have been investigated at 60 Mc/s. The spectral parameters for the heterocyclic ring protons have been obtained by analysis of the frequency-sweep double-resonance spectra and verified by an iterative technique using a digital computer. Long- range coupling constants were observed between the protons at C 4 and C 5 (J 0.8 c/s) and between the protons at C 2 and C 4 (J 0.2 c/s) for the cis isomer.

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