Further Evidence for the Triplet Mechanism in the Photosubstitution of Nitroaryl Ethers in Alkaline Medium.
…, AC Tedesco, LC Nogueira, MTRS Diamantino…
Index: Bonilha, Joao Baptista Sargi; Tedesco, Antonio Claudio; Nogueira, Lazaro Cicero; Ribeiro, Maria Teresa; Diamantino, Silva; Carreiro, Julio Cesar Tetrahedron, 1993 , vol. 49, # 15 p. 3053 - 3064
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Citation Number: 11
Abstract
Mechanistic studies show that nitroaryl ethers (3-nitroanisole, 3-nitrophenetole, n-butyl 3- nitrophenyl ether, 2-chloro-5-nitroanisole, 2-bromo-5-nitroanisole and 3, 5-dinitro anisole) undergo nucleophilic aromatic photosubstitution with hydroxide ions through an SN23Ar* mechanism. An investigation of the quenching of exited states of nitroanyl ethers by bromide and thiosulfate ions in aqueous solutions is reported and lends support to the proposed ...