Correlation between stabilities of uranyl ion complexes with various monocarboxylic acids and Hammett-Taft substituent constants

A correlation has been observed between the stabilities of uranyl ion complexes (1:1 composition) and the substituent inductive constants in formic and acetic acid derivatives. For substituents which are not directly involved in couples formation the parameters of the Hammett-Taft equation log K1 = A + B have the following values: A = 1.311, B = -2.360. For substituents which form a coordination bond with the uranyl ion, A = 7.0077 and B = - 17.321. In the case of complexes formed between the uranyl ion and salicylic acid and its derivatives, there is a correlation between complex stability and σ/sub m/ and σ/sub p/ substituent constants for the meta- and para-positions, respectively (A = 12.72, B = -4.41)