Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Cover Picture (Angew. Chem. Int. Ed. Engl. 8/1994)
The cover picture shows the deflagration of 20 mg of hexaspiro-[126.96.36.199.188.8.131.52.184.108.40.206]dotetraconta-4,6,11,13,18,20,25,27,32,34,39,41-dodecayne—truly an exploding rotane—and the chair-shaped structure of its 30-membered ring with six 1,3-butadiyne and six spirocyclopropane units. The compound is obtained in 39% yield from the oxidative coupling of two open-chain halves and decomposes spontanteously upon heating or impact. The picture was put together electronically from a videotape of the explosion and a representation of the crystal structure (fototeam Hansjürgen Gutzeit GmbH, Göttingen (FRG)). A. de. Meijere et al. report on this and related molecules on p. 869 ff.