Abstract
The nitration product of phenazine, which was previously described as 1, 3-dinitrophenazine, was proved to be a mixture of 1, 6-and 1, 9-dinitrophenazines. These structures were determined by their conversion into dihydroxyphenazines by way of diaminophenazines. From the nitration of phenazine N-oxide under high temperature, two isomers, 1, 7-dinitrophenazine 5-oxide and 3, 7-dinitrophenazine-5-oxide were obtained.
