The compositions, stability constants, and rate constants of intramolecular redox decomposition of cerium(IV) complexes with anions of aminoacetic (H2NCH2COOH), iminodiacetic [HN(CH2COOH)2], nitrilotriacetic [N(CH2COOH)3], ethylenediaminetetraacetic [(CH2COOH)2N(CH2)2N(CH2COOH)2], and hexamethylenediaminetetraacetic [(CH2COOH)2N(CH2)6N(CH2COOH)2] acids were determined by potentiometric, spectrophotometric, and kinetic methods at pH in the range 1.3−2.0 in perchlorate and nitrate media at an ionic strength I = 0.1 and a temperature of 298.15 K. Direct linear correlation between the logarithms of the stability constants of the complexes, log β101, and logarithms of the cumulative protonation constants, log В m+k (k = 1–2), of aminopolyacetic acid anions L m–, and inverse linear correlation between log β101 and logarithms of the rate constants of intramolecular redox decomposition of the complexonates [CeL]4–m (m = 1–4), log k n=1, were found.
Russian Journal of Applied Chemistry – Springer Journals
Published: Feb 24, 2017
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