
TY  - JOUR
A1  - Itzstein, Mv 
A1  - Jenkins, ID 
T1  - Preparation and nuclear magnetic resonance studies of diaryloxytriphenylphosphoranes. Correlation of substituent effects with <sup>31</sup>P N.M.R. chemical shifts
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1984
VL  - 37
IS  - 12
SP  - 2447
EP  - 2451
KW  - 
UR  - https://doi.org/10.1071/CH9842447 
N2  - Triphenylphosphine and diisopropyl azodicarboxylate react with phenols in tetrahydrofuran or chloroform at 0&#176; to give diaryloxytriphenylphosphoranes. A linear free-energy relationship has been found between the 31P n.m.r. chemical shifts of many of these phosphoranes and the acid dissociation constants of the corresponding phenols. In general, electron-withdrawing groups on the phenol result in downfield 31P n.m.r. chemical shifts, while electron donating groups result in up-field shifts. 
ER  -

