Hexahelicene seems a poor candidate for optical activity because all its carbon atoms ar...

Hexahelicene seems a poor candidate for optical activity because all its carbon atoms are sp²

hybrids and presumably flat. Nevertheless, hexahelicene has been synthesized and

separated into enantiomers. Its optical rotation is enormous:[α]_D = 3700^o.Explain why

hexahelicene is optically active, and speculate as to why the rotation is so large.