Structure and spectral characteristics of the benzene-2,2-diazo-quinone-4-sulphonic acid

It was prepared benzene-2,1-diazoquinon-4-sulphonated acid by diazotization of 2-aminophenol-4-sulphonated acid. The NMR, IR, UV-VIS spectra recording of this substance have been furnished information about the existence of a strong interaction between the diazo and carbonil groups. The thermal deco mposition in water solution of this aromatic diazoquinone compound verifies a first order kinetics. It was proposed a reaction mechanism which corespo nds of a Wolff rearrangement with cicle contraction.