Septulene: The Heptagonal Homologue of Kekulene (pages 12795–12800)
Bharat Kumar, Ruth L. Viboh, Margel C. Bonifacio, William B. Thompson, Jonathan C. Buttrick, Babe C. Westlake, Min-Soo Kim, Prof. Robert W. Zoellner, Prof. Sergey A. Varganov, Philipp Mörschel, Jaroslav Teteruk, Prof. Dr. Martin U. Schmidt and Prof. Benjamin T. King
Article first published online: 12 OCT 2012 | DOI: 10.1002/anie.201203266
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.