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- W1974723074 abstract "Using cyclic voltammetry, the electrochemistry of aqueous solutions of 4-methoxy-1,2-benzoquinone was investigated over the pH range 0–8. From the variation of half-wave potential with pH, it was inferred that the quinone was reduced to the hydroquinone; no acid-base reactions involving either the quinone or hydroquinone were observed. At low pH ( < 3), the cyclic voltammogram of the benzoquinone changed rapidly to a second pair of peaks at lower potentials. These were shown to be due to 2-hydroxy-1,4-benzoquinone, formed by hydrolysis of the original compound. The other hydrolysis product, methanol, was detected chromatographically. The hydrolysis reaction was shown to be first order both with respect to the 1,2-benzoquinone and protons. At pH 6 and above, 4-methoxy-1,2-benzoquinone showed a second type of decomposition whose rate was approximately first order in hydroxide ion. Using electrochemical and spectroscopic measurements, it was also demonstrated that 4-methoxy-1,2-benzoquinone was formed during the tyrosinase-catalysed oxidation of 4-methoxyphenol. This confirms that this quinone could be involved in the melanocytoxic action of 4-methoxyphenol." @default.
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- W1974723074 date "1988-09-01" @default.
- W1974723074 modified "2023-09-25" @default.
- W1974723074 title "The electrochemistry of aqueous solutions of 4-methoxy-1,2-benzoquinone" @default.
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- W1974723074 doi "https://doi.org/10.1016/0302-4598(88)80031-x" @default.
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