Premium
SUBSTITUENT EFFECTS ON THE PROTOLYTIC DISSOCIATION OF ELECTRONICALLY EXCITED PHENOLS *
Author(s) -
Bartok William,
Hartman Richard B.,
Lucchesi Peter J.
Publication year - 1965
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1965.tb09766.x
Subject(s) - excited state , substituent , chemistry , singlet state , dissociation (chemistry) , photochemistry , hammett equation , acid dissociation constant , ground state , phenols , dissociation constant , reactivity (psychology) , excitation , reaction rate constant , computational chemistry , aqueous solution , atomic physics , organic chemistry , kinetics , quantum mechanics , physics , medicine , biochemistry , receptor , alternative medicine , pathology
— The aqueous dissociation of electronically excited singlet states of a series of mono‐substituted phenols has been investigated spectroscopically. Apart from the greatly enhanced acidity of these species resulting from excitation, the electronic effects of substituents are similar for ground and excited singlet state reactions. The dissociation constants for the excited state appear to be correlated with ground state values of the substituent constants. The possible generality of the Hammett equation for correlating the effects of substituents on the reactivity of excited singlet states is discussed.