Abstract
The kinetics of electron transfer between chromium(VI) and H3PO3, yielding chromium(III), have been investigated in HClO4 and H2SO4 media by visible spectrophotometry. The rate of reaction increased with increasing [H2SO4] and [HClO4]. A rate law based on ester formation preceding the electron transfer has been established and a possible mechanism has been proposed. The mechanism and the derived rate law are consistent with the observed kinetics.
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Khan, Z., Hashmi, A.A. & Kabir-ud-Din Reduction of chromium(VI) by phosphonic acid. Transition Metal Chemistry 23, 147–150 (1998). https://doi.org/10.1023/A:1006995026227
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DOI: https://doi.org/10.1023/A:1006995026227