A series of diindeno[2,1-b:2′,1′-h]biphenylenes with open-shell singlet ground states and interesting properties were prepared. The studied compounds consist of p-quinodimethane moieties, which suffer from geometric perturbation with bond angles of around 90°. The substituent effects on structural parameters, local aromaticity, and properties were systematically explored.

中文翻译：

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二茚并[2,1-b:2',1'-h]联苯：合成、结构分析和性质

制备了一系列具有开壳单线态基态和有趣性质的二茚并[2,1- b :2', 1' - h ]联苯。所研究的化合物由对-醌二甲烷部分组成，其受到几何扰动的影响，键角约为 90°。系统地探索了取代基对结构参数、局部芳香性和性质的影响。