EPR studies on carboxylic esters. Part 16. Indirect�generation of the elusive radical anions of alkyl �anthracene-9-carboxylates
作者:Thomas Behrens、Stefan Bruns、J�rgen Voss
DOI:10.1002/1099-1395(200010)13:10<624::aid-poc285>3.0.co;2-t
日期:2000.10
aprotic media yields superoxide anions O2.−. These highly reactive radical anions easily attack sensitive arenes. It is, therefore, not possible to generate the radical anions of anthracene-9-carboxylic esters (1) by direct in situ electroreduction. Because derivatives substituted in the 10-position are stable against these radicals, indirect generation of the radical anion 1.− was realized in order to
非质子介质中分子氧的电还原产生超氧阴离子 O2.−。这些高反应性自由基阴离子很容易攻击敏感的芳烃。因此,不可能通过直接原位电还原产生蒽-9-羧酸酯 (1) 的自由基阴离子。因为在 10 位取代的衍生物对这些自由基是稳定的,所以实现了自由基阴离子 1.- 的间接生成,以便能够测量其 EPR 光谱。在一系列 EPR 实验中,我们能够研究各种取代基对蒽衍生物对超氧化物的稳定性和自旋密度分布的影响。版权所有 © 2000 John Wiley & Sons, Ltd.