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Mono‐complex formation kinetics of 2‐acetylcyclohexanonatochromium(III) in aqueous solution
Author(s) -
Blanco Carlos A.,
Hernando José M.,
Mateo Manuel
Publication year - 1992
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550240603
Subject(s) - chemistry , ionic strength , aqueous solution , kinetics , tautomer , reaction rate constant , cyclohexanone , chromium , ligand (biochemistry) , ionic bonding , equilibrium constant , inorganic chemistry , enol , computational chemistry , medicinal chemistry , ion , catalysis , organic chemistry , biochemistry , physics , receptor , quantum mechanics
The kinetics and mechanism of the reaction of complexation of chromium(III) with 2‐acetyl‐cyclohexanone has been investigated spectrophotometrically in aqueous solution at 50°C and ionic strength 0.5 mol dm −3 NaClO 4 . The equilibrium constants of the complex have been determined. The mechanism proposed to account for the kinetic data involves a double reversible pathway where both Cr 3+ and Cr(OH) 2+ react with the enol tautomer of the ligand with rate constants of 9.6 × 10 −3 dm 3 mol −1 s −1 , and 3.69 × 10 −2 dm 3 mol −1 s −1 , respectively. Some discussions are made on the basis of Eigen‐Wilkins theory considering the effect of solvent exchange on the complex formation.