Angewandte Chemie International Edition

Cover image for Vol. 53 Issue 36

Editor: Peter Gölitz, Deputy Editors: Neville Compton, Haymo Ross

Online ISSN: 1521-3773

Associated Title(s): Angewandte Chemie, Chemistry - A European Journal, Chemistry – An Asian Journal, Zeitschrift für Chemie

Cover Picture (Angew. Chem. Int. Ed. Engl. 9/1988)

27_09/1988The cover picture shows the molecular structure of centrohexaindan. The fascination of this topologically nonplanar molecule lies in the annelation of six cyclopentane rings around a central C-atom common to all rings. The central neopentane skeleton is bridged by six o-phenylene groups corresponding to the six edges of a regular tetrahedron, so that the central quaternary C-atom is surrounded by four further, equivalent quaternary C-atoms and should display ideal tetrahedral coordination. The molecule as a whole should have perfect Td symmetry in the ground state. It contains three fused 2,2'-spirobiindans, tribenzotriquinacene and triptindan (sym-tribenzo[3.3.3]propellane) are fourfold degeneratively condensed with each other, and finally the molecule also contains three fenestranes (tetrabenzo[5.5.5.5]fenestranes). Further details of this readily synthesizable compound are reported by D. Kuck et al, on page 1192.

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