High order stacking of a perfluoro 'Y-enyne'

The X-ray structure of perfluorophenyl substituted Y-enyne 1 reveals a face -to-face stacking interaction between phenyl and perfluorophenyl groups of different molecules resulting in a high order in the solid state. Acetylene -arene and acetylene-fluorine interactions also contribute to the high orde r stacking. The X-ray structure suggests a distorted conjugation of the chr omophore. (C) 2001 Elsevier Science Ltd. All rights reserved.