1451008-09-5Relevant articles and documents
Synthesis, structural analysis, and properties of [8]circulenes
Feng, Chieh-Ning,Kuo, Ming-Yu,Wu, Yao-Ting
, p. 7791 - 7794 (2013)
Polygons: [8]Circulenes were easily prepared by Pd-catalyzed annulations of tetraiodotetraphenylenes with alkynes. Their saddle-shaped structure with an [8]radialene character was identified by X-ray crystallography. Similar to 1,3,5,7-cyclooctatetraene, they have a tub-shaped eight-membered ring, but all of the bond lengths and bond angles are almost equal. Variable-temperature NMR investigations showed interesting dynamic behavior. Copyright