Title of article :
Substituent effects on ionisation and 13C NMR properties of some monosubstituted phenols: A potentiometric, spectrophotometric and 13C NMR study
Author/Authors :
Crisponi، نويسنده , , Guido and Casu، نويسنده , , Mariano and Nurchi، نويسنده , , Valeria Marina and Cesare-Marincola، نويسنده , , Flaminia and Pivetta، نويسنده , , Tiziana and Silvagni، نويسنده , , Roberta، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2002
Abstract :
The pKa values of ionisation of a set of phenols ortho, meta and para substituted are studied by spectrophotometry and 13C NMR spectroscopy. A dual substituent analysis of equilibrium and NMR results, according to the Swain and Lupton procedure, is presented. The results of this analysis allow the assignment of the contribution of field and resonance contributions, both on equilibrium constants and chemical shifts.
Keywords :
UV–vis spectroscopy , 13C NMR chemical shift , Fibre optics , substituent effect , Swain–Lupton constants , Potentiometry , Ionisation constants
