Abstract 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 19 F chemical shifts. Further the relative π-electron distributions of several benzocycloalkenes are indicated.
![5-fluorobicyclo[4.2.0]octa-1(6),2,4-triene结构式](https://image.chemsrc.com/caspic/077/51736-79-9.png)
