9,10,11,20,21,22-Hexaphenyltetrabenzo[a,c,l,n]pentacene

This is 9,10,11,20,21,22-hexaphenyltetrabenzo[a,c,l,n]pentacene, the most highly twisted polycyclic aromatic hydrocarbon ever prepared. Its X-ray structure shows an end-to-end twist of 144. Unlike similar molecules that we have prepared previously, this hydrocarbon is resolvable into pure enantiomers with specific rotations of plus and minus 7400! For a brief communication describing the synthesis and structure of this compound, see "A Pentacene with a 144 Twist," J. Lu, D. M. Ho, N. J. Vogelaar, C. M. Kraml, and R. A. Pascal, Jr., J. Am. Chem. Soc. 2004, 126, 11168-11169.