Carbon-13 nuclear magnetic resonance spectroscopical and stereochemical investigations. 18. Electric field effects on carbon-13 nuclear magnetic resonance shifts in heterosubstituted alkanes

1977 ◽  
Vol 99 (25) ◽  
pp. 8363-8364 ◽  
Author(s):  
Hans Joerg Schneider ◽  
Wolfgang Freitag
1976 ◽  
Vol 29 (12) ◽  
pp. 2571 ◽  
Author(s):  
W Adcock ◽  
BD Gupta ◽  
T Khor

A number of model substituted bicyclic aryl fluorides, including three new fluorobenzocycloalkenes, have been synthesized and their fluorine- 19 spectra measured. An analysis of the data leads to the important conclusion that electrostatic-field effects play an important role in determining aryl 19F chemical shifts. Further the relative π-electron distributions of several benzocycloalkenes are indicated.


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