A completely planar, delocalized 14π-electron system which does not contain cyclically conjugated substructures characterizes the title compound 2. A productive synthesis of the 1,2-bis(tert-butylcyclopentadienyl)ethane 1 enabled the construction of the novel non-benzenoid aromatic hydrocarbon 2. which also contains one of the few planar eight-membered rings.
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Häfner et al. (1988) studied this question.
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