Abstract
The mono‐ and di‐sulphuric esters of l:4‐naphthaquinol react with acidic hydrogen peroxide in the same way as the di‐sulphuric ester of 9:10‐anthraquinol‐2‐sulphonic acid: i.e. removal of most of the sulphate groups by direct oxidation follows removal of some groups by hydrolysis. The catalytic effect of the mono‐ester in the oxidation of the di‐ester has been directly demonstrated. On the other hand, with the mono‐ and di‐sulphuric esters of quinol, the sulphate groups are not removed by direct oxidation but by hydrolysis only. Oxidation of the resultant quinol then follows as a separate reaction.
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