PULSE RADIOLYSIS OF BENZOQUINONE AND HYDROQUINONE - SEMIQUINONE FORMATION BY WATER ELIMINATION FROM TRIHYDROXYCYCLOHEXADIENYL RADICALS
PULSE RADIOLYSIS OF BENZOQUINONE AND HYDROQUINONE - SEMIQUINONE FORMATION BY WATER ELIMINATION FROM TRIHYDROXYCYCLOHEXADIENYL RADICALS
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DOI：
10.1039/tf9676301171
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发表时间：
1967-01-01
影响因子：
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通讯作者：
MICHAEL, BD
中科院分区：
文献类型：
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作者：
ADAMS, GE;MICHAEL, BD
对苯醌和对苯二酚在脉冲辐解过程中产生的瞬态自由基光谱进行了观测和表征。半醌自由基和自由基阴离子直接由e-aq和H原子与苯醌反应产生，也可由三羟基环己二烯基单分子消除水产生。后一种物质直接通过OH加成到对苯二酚上而产生。测量了各种物种的消光系数和它们的形成和衰变的反应速率常数。苯半醌自由基和自由基-阴离子平衡的平衡常数为10-4 M。
A number of transient free-radical spectra produced during the pulse radiolysis of benzoquinone, and hydroquinone, have been observed and characterized. The semiquinone radical and radical-anion are produced directly by reactions of e–aq and H atoms with benzoquinone and also by the unimolecular elimination of water from trihydroxycyclohexadienyl radicals. The latter species arise directly by OH addition to hydroquinone. The extinction coefficients of the various species and the reaction rate constants for their formation and decay have been measured. The equilibrium constant for the benzsemiquinone radical and radical-anion equilibrium is 10–4 M.