Letters to the Editors

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THE value of KFeDipy obtained by Dr. Krumholz from kinetic measurements agrees very well with a value of 1·64 × 104 (independent of temperature) which we have obtained from equilibrium measurements based on the incomplete formation of Fe(Dipy)32+ in excess ferrous ion reported earlier. It appears from our results that it is not possible to obtain appreciable amounts of Fe(Dipy)22+ ; hence a precise value of KFeDipy2 cannot be obtained, but only its upper limit, KFeDipy2 105.

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BAXENDALE, J., GEORGE, P. Letters to the Editors. Nature 163, 725 (1949) doi:10.1038/163725a0

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