
%0 Journal Article
%A Adcock, W 
%A Bettess, PD 
%A Rizvi, SQA 
%T Fluorine-19 substituent chemical shifts (SCS)
%J Australian Journal of Chemistry
%D 1970/10/01
%V 23
%N 10
%P 1921-1937
%K 
%R https://doi.org/10.1071/CH9701921
%U https://www.publish.csiro.au/paper/CH9701921 
%X A number of substituted aryl fluorides have been synthesized and their fluorine-19 substituent chemical shifts (scs) have been measured. The comparison of the scs of 1-(m-fluorophenyl)propan-2-one, 1-(p-fluorophenyl)propan-2-one, 7-fluorotetral-2-one, and 6-fluorotetral-2-one confirm Dewarsl-3 conclusions that long-range non-mesomeric effects are transmitted through space and that this polar effect makes a considerable contribution to the overall 19F scs in aromatic systems. It is also shown that the fluorine substituent chemical shifts of +F+M substituents in 7-substituted 2-fluoronaphthalenes (7&#946;) can be interpreted in terms of a modified FM treatment. The mesomeric-field effect is shown to be important in this disposition (78) of naphthalene. 
