
TY  - JOUR
A1  - Bolton, PD 
A1  - Hall, FM 
T1  - Substituent effects on the thermodynamic functions of ionization of metasubstituted anilinium ions
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1968
VL  - 21
IS  - 4
SP  - 939
EP  - 946
KW  - 
UR  - https://doi.org/10.1071/CH9680939 
N2  - Thermodynamic acidity constants of the meta-methoxyanilinium, meta-   chloroanilinium, meta-bromoanilinium, and meta-iodoanilinium ions have been measured spectrophotometrically over the temperature range 5-50º and those of the meta-nitroanilinium ion over the temperature range 5-60º. The thermodynamic functions of ionization, &#916;G25, &#916;H25, &#916;S25, and &#916;Cp,25, have also been calculated for each ion. For a series of seven meta-substituted anilinium ions the acidity constants show close obedience to the Hammett equation over the temperature range 10-50º with the reaction parameter p being a precise linear function of 1/T. The same reaction series also shows a well-defined isoequilibrium relationship of negative slope. 
ER  -

