Helicene dianions: the effect of charge on the barrier to racemisation
作者:Ron Frim、Gil Zilber、Mordecai Rabinovitz
DOI:10.1039/c39910001202
日期:——
The reduction of the polycyclic helicene 5-isopropyl-1,4,8-trimethylphenanthrene yields a 4nπ conjugated dianion which preserves its helicity despite the decreased barrier to racemisation.