title: Substituent effects on ionisation and (13)C NMR properties of some monosubstituted phenols A potentiometric, spectrophotometric and (13)C NMR study.
abstract: The pK(a) values of ionisation of a set of phenols ortho, meta and para substituted are studied by spectrophotometry and (13)C 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.
authors.affiliation: Dipartimento di Chimica Inorganica e Analitica, Università di Cagliari, Complesso Universitario di Monserrato, 09042 Monserrato, Cagliari, Italy.
authors.forename: Guido
authors.initials: G
authors.lastname: Crisponi
authors.forename: Mariano
authors.initials: M
authors.lastname: Casu
authors.forename: Valeria Marina
authors.initials: VM
authors.lastname: Nurchi
authors.forename: Flaminia
authors.initials: F
authors.lastname: Cesare-Marincola
authors.forename: Tiziana
authors.initials: T
authors.lastname: Pivetta
authors.forename: Roberta
authors.initials: R
authors.lastname: Silvagni