The extended-quinone derivative of cyclopent[fg]acenaphthylene-1,2-dione (pyracyloquinone) is first synthesized and characterized. An X-ray analysis exhibits the non-planar structure involving bent of two 3,5-di-tert-butyl-4-oxo-cyclohexadienylidene units, and bond alternation along the molecular periphery. The facile formation of trianion radical on cyclic voltammetry reflects high-electron affinity enhanced by antiaromatic character of the formed pyracylene moiety on the dianion state.

中文翻译：

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Cyclopent[fg]acenaphthylene-1,2-bis(p-quinone methide)s 衍生物的合成、结构和性质。延长的吡咯醌

首先合成并表征了环戊[fg]苊-1,2-二酮（pyracyloquinone）的扩展醌衍生物。X 射线分析显示非平面结构涉及两个 3,5-二叔丁基-4-氧代-环己二亚基单元的弯曲和沿分子外围的键交替。在循环伏安法中容易形成三阴离子自由基，这反映了高电子亲和力通过在二价阴离子状态下形成的对芳基部分的抗芳族特征而增强。