
TY  - JOUR
A1  - Happer, DAR 
A1  - Steenson, BE 
T1  - The Determination of Substituent Effects by 13C Nuclear Magnetic Resonance Spectrometry. The Effect of Solvent on CH<sub>2</sub>X Groups
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1985
VL  - 38
IS  - 2
SP  - 337
EP  - 342
KW  - 
UR  - https://doi.org/10.1071/CH9850337 
N2  - A previous study of the effect of meta- and para-CH2X substituents on the 13C n.m.r. chemical shifts of the &#945; and &#946; side-chain carbons of &#946;- methoxycarbonylstyrenes (methyl cinnamates ) in ethanol has been extended to cover five additional solvents (Me2SO, Me2CO, CDCl3, CCl4 and C6H6). The results support the earlier claim that, for most substituents , the magnitudes of the substituent -induced shifts are proportional to the inductive effect of X. The major contributor to the latter appears to be the field effect generated by the C-X dipole, with the lines of force passing mainly through the molecule. In non-polar solvents, however, there is evidence that lines of force passing directly through the solvent can also influence the shifts in both the meta and para series. 
ER  -

