Hammett acidity function


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Hammett acidity function

[′ham·ət ə′sid·əd·ē ‚fəŋk·shən]
(chemistry)
An expression for the acidity of a medium, defined as h0= KBH +[BH +]/[B ] , where KBH +is the dissociation constant of the acid form of the indicator, and [BH +] and [B ] are the concentrations of the protonated base and the unprotonated base respectively.
References in periodicals archive ?
The acidities of ILs were characterized and determined on the basis of the Hammett acidity function [18].
As shown in the followi ng equation, the Hammett acidity function is expressed as: H= PK (I)aq + log ([I]/[IH]+).
5 (Entries 6, 9 and 12), the obtained ILs were only BrAlnsted acidic, and their Hammett acidity functions (H0) were near to those of BrAlnsted-Lewis acidic ILs which x value were more than 0.