Article,

Septulene: The Heptagonal Homologue of Kekulene

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Angew. Chem. Int. Ed., 51 (51): 12795--12800 (Dec 14, 2012)
DOI: 10.1002/anie.201203266

Abstract

A family likeness: The seven-sided homologue of kekulene, septulene (see structure), has been synthesized in seven steps by ring-closing metathesis. Its properties (spectroscopic and structural) are strikingly similar to those of kekulene despite its sevenfold symmetry and resulting non-alternant structure. The chair-type conformation in the crystal arises from packing forces. Septulene is probably a free pseudorotor in the gas phase.

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