Premium
Uncharged Co(lll) Complexes: Transfer Chemical Potentials and Base Hydrolysis in Water‐Methanol Mixtures
Author(s) -
AbuGharib EzzEldin A.
Publication year - 1994
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199400054
Subject(s) - chemistry , aqueous solution , methanol , hydrolysis , solvent , reaction rate constant , inorganic chemistry , solubility , reactivity (psychology) , kinetics , organic chemistry , medicine , physics , alternative medicine , pathology , quantum mechanics
Solubilities are reported for three Co(III) complexes of 2‐aminophenol, 2‐amino‐4‐nitrophenol and 6‐amino‐2,4‐dimethylphenol. Transfer chemical potentials have been derived from appropriate solubility measurements in aqueous methanol. The trends in transfer chemical potentials are discussed in terms of the nature of the coordinated ligands and are compared with those for selected of other inorganic Co(III) complex ions. The kinetics of base hydrolysis of Co(III) complexes in aqueous methanol solutions are described and the change in the activation barrier δ m ΔG ≠ is determined. Solvent effects on reactivity trends are analysed into initial state and transition state components. The small decrease in the rate constant, with increasing proportion of methanol, is ascribed to a greater effect of solvent on the initial state.