Bulletin of the Chemical Society of Japan p. 3183 - 3185 (1992)
Update date:2022-08-11
Topics:
Usui, Yoshiharu
Takebayashi, Shigeharu
Takeuchi, Manabu
Photochemical nitration of p-hydroxybenzoate, HBA, initiated by UV irradiation to sodium nitrate or sodium nitrite was observed in aqueous solutions. 4-Hydroxy-3-nitrobenzoate was formed, with maximum quantum yields of 0.007 and 0.09 for NaNO3 and NaNO2, respectively.From the dependence of the yields on the pH and concentrations of oxygen and OH-scavengers, we propose a mechanism involving the addition of OH(radical) to the aromatic ring of HBA and electron abstraction from NO2 by the OH(radical) adduct for the photonitration.
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