A stable unsubstituted 4nπ-electron acene with an antiaromatic 1,4-diazapentalene core was prepared via an unprecedented mild oxidation. Further investigation showed that the stability of such acenes was dependent on the fusion patterns of the peripheryl benzene rings to the centre core.
通过前所未有的温和氧化反应,制备了一个具有反芳香性1,4-二氮杂五环核心的稳定未取代的4nπ电子芴。进一步研究表明,这种芴的稳定性取决于周边苯环与中心核心的融合方式。