SCHEDULED MAINTENANCE
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.
R. Frim, G. Zilber and M. Rabinovitz, J. Chem. Soc., Chem. Commun., 1991, 1202 DOI: 10.1039/C39910001202
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