143825-63-2Relevant academic research and scientific papers
Oxidation of 1,10-Phenanthroline by Tetraoxomanganate (VI) and (VII). Preparation, Structure and Properties of 1H-Cyclopentadipyridine-2,5-dione
Baxter, Paul N. W.,Connor, Joseph A.,Wallis, John D.,Povey, David C.,Powell, Anne K.
, p. 1601 - 1606 (2007/10/02)
Oxidation of 1,10-phenanthroline with tetraoxomanganate (VI) gave good yields of ketone 3 and the previously unknown dione 5, formed by the unusual further oxidation of 3 at the 2 position of a pyridine ring.In contrast, use of the tetraoxomanganate (VII) gave the bipyridine diacid 2 (69percent), ketone 3 (20percent) and only a trace of the dione 5.The X-ray crystal structure of the anion of 5 indicates that the negative charge is located mainly on the 2-O rather than 5-O atom, with some delocalisation into the pyridine ring.
