25538-77-6Relevant academic research and scientific papers
MECHANISM OF AZO COUPLING. VI. REACTIONS OF THE p-NITROBENZENEDIAZONIUM ION WITH (PHENYLAZO)PHENOL AND ITS DERIVATIVES
Bagal, I. L.,Zul'figarov, O. S.,Yurchenko, V. V.,Trachevskii, V. V.,El'tsov, A. V.
, p. 762 - 767 (2007/10/02)
According to the results of elemental analysis, high-performance liquid chromatography, and NMR, UV, and IR spectroscopy the preparatively isolated products of the reactions of the p-nitrobenzenediazonium ion with p-(phenylazo)phenol and its derivatives are derivatives of 4,4-bis(p-nitrophenylazo)-2,5-cyclohexadien-1-one.The products are stable in the solid state and in neutral media.In acid and alkaline media they are split with the formation of the nitrobenzenediazonium ion and the corresponding p-(phenylazo)phenols.The product with a cyclohexadienone structure is regarded as a model of the second of the two successively formed intermediate complexes in the azo coupling.
