Unusual redox properties of a sterically hindered water-soluble chromium porphyrin. Electrochemical and spectral speciation

Abstract

meso-Tetrakis(3-sulfonatomesityl)porphyrinato]chro-mium( III) [Cr^III(tsmp)] in aqueous solution can undergo electrochemical reduction to form a stable radical anion and oxidation to generate very stable radical cations Cr^III(tsmp.⁺) and O=Cr^IV(tsmp.⁺), which reacts with alkenes to produce enones at room temperature.

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