期刊
HIGH ENERGY CHEMISTRY
卷 45, 期 3, 页码 210-213出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0018143911030064
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Photosubstitution of the sulfo group for hydrogen (chlorine in chloranil) is observed under irradiation of sulfonated derivatives of hydroquinone formed upon dissolving of p-benzoquinone and p-chloranil in aqueous solutions of sodium sulfite. The quantum yield of the photochemical reaction is 0.18 +/- 0.02 for p-benzoquinone. The rate constant of the thermal reaction of substitution is 5.5 x 10(-4) l mol(-1) s(-1). The substitution reaction is sensitized by eosin upon irradiation with visible light. During the course of irradiation of sulfohydroquinones, the formation of a product with an absorption maximum at 235 nm was found. The product decays with a rate constant of 0.005 s(-1).
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