Browsing by Author "Wells, C. F."

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    Kinetics of the Oxidation of Formic Acid by Aquomangancse(III) Ions in Aqueous Perchlorate Media
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (3), 1972) Wells, C. F.; Whatley, D.
    The kinetics of the slow oxidation of formic acid by aquomangancsc(IIl) ions in aqueous perchlorate media show that intermediate complexes arc present; three complexes arc postulated to explain the variation of rate with acidity, and enthalpies and entropies of formation arc found for two of them. Energies and entropies of activation arc calculated for the decomposition of all three complexes, and these arc discussed in relation to the structure of the transition states.
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    Use of p-Nitroaniline to Determine Protonation Equilibrium Constants of Oxygen-containing Molecules in Aqueous Solution
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (6), 1972) Wells, C. F.
    Thccriticismscontaincd in a recent paper 1 of the interpretation in termsof protonation equilibria 2,3 involving (H20)4 Haq+ of the changes in optical density of acidic solutions of p-nitroanilinc on addition of organic oxygen containing substrates arc discussed. It is concluded that the effects of activity coefficients arc too small to influence the interpretation, and it is indicated how attacking molecules distinguish between protonated and unprotonated molecules of substrate in oxidation reactions and complexing equilibria. Good agreement is obtained for protonation equilibrium constants between values from this spectrophotometric method and values obtained using a range of other independent techniques.