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Die Redox‐Eigenschaften von Hydroxyanthrachinonsulfonsäuren II
Author(s) -
Broadbent A. D.,
Zollinger Hch.
Publication year - 1966
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19660490602
Subject(s) - chemistry , polarography , semiquinone , redox , potentiometric titration , base (topology) , molecule , photochemistry , inorganic chemistry , organic chemistry , ion , mathematical analysis , mathematics
The formation of intermediates in the reduction of two hydroxyanthraquinonesulphonic acids has been investigated by potentiometric and polarographic techniques. Acid‐base properties of molecules in the redox sequences have been deduced. In certain pH regions measurements were hindered by specific physical and chemical side‐reactions. Reduction in strongly alkaline solution only produces semiquinone free radical intermediates, but below pH 10 bimolecular quinhydrones may also be formed.