Chiral Cycloparaarylenes Incorporating Binaphthyl Units: Dramatic Effects of Peripheral Functionalization on (Chir)Optical Properties.
Axially chiral [12]cycloparaarylenes 1 and 2, consisting of three each of 1,1'-binaphthyl and biphenyl units, were synthesized. Their characteristics were distinct from those of [12]cycloparaphenylene and depended on whether the 2,2'-substituents on the binaphthyls were methoxy groups or a methylenedioxy bridge. 1 with...