
TY  - JOUR
A1  - Brownlee, RTC 
A1  - Craik, DJ 
T1  - <sup>19</sup>F N.M.R. chemical shifts in substituted benzotrifluorides and benzal fluorides
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1980
VL  - 33
IS  - 11
SP  - 2555
EP  - 2559
KW  - 
UR  - https://doi.org/10.1071/CH9802555 
N2  - 19F substituent chemical shifts (scs) for a series of meta and para benzotrifluorides (p-trifluoromethyl-benzenes) are reported and are found to follow the reverse scs trend previously noted for benzyl fluorides (fluoromethylbenzenes), i.e. donors cause downfield shifts and acceptors upfield ones. Specific deviations for electron- withdrawing substituents make DSP correlations for the benzo- trifluorides less precise than for benzyl fluorides. A series of p- benzal fluorides (p-difluoromethyl-benzenes) has also been synthesized and the scs values are also found to follow the reverse trend. The magnitude of scs values decreases in the sequence benzyl fluorides > benzal fluorides > benzo-trifluorides. 
ER  -

