Reversible Redox Behavior between Stannole Dianion and Bistannole-1,2-Dianion

摘要

There has been considerable recent interest in the dianions of group 14 metalloles as heavier congeners of the cyclopentadienyl anion which plays an important role in organic chemistry.The negative charges in the dianions of siloles and germoles significantly delocalize in the C4M(M=Si,Ge)ring and they were concluded to be aromatic.Very recently,we have reported the synthesis of the first stannole dianion,which was concluded to be aromatic by the aid of NMR analysis,X-ray structural analysis and theoretical calculations.Although the dianions of group 14 metalloles have been well investigated from the viewpoint of their aromaticity,there are only a few reports on the reactions of these novel aromatic compounds besides those with simple electrophiles.