Substituent effects upon the peak potentials and reductive cleavage rate constants of hydroxy- and methoxy-substituted 9,10-anthraquinones in 50% aqueous CH3CN: do they correlate?

A variety of hydroxy- and methoxy-substituted 2-(acetoxymethyl)9,10-anthraquinones were reduced electrochemically and with dithionite in 50% aqueous CH 3 CN buffers over a wide pH range. Substituent effects upon the reductive cleavage process were determined by measuring rate constants for those acetates that react cleanly with dithionite at pH 8