"CORRELATION BETWEEN MÖSSBAUER PARAMETERS OF IRON (III) SUBSTITUTED BENZOATES AND THEIR HAMMETT σ FUNCTIONS"

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The study by Mossbauer spectroscopy of various iron (III) salts of p-substituted benzoic acids shows a dependence between Mossbauer parameters and both Hammett's σ and σ0 functions. These results suggest that the substitution of the phenyl ring does not change the ionisation state of iron. Furthermore, σ and σ0 can be readily estimated by Mossbauer spectroscopy.