The alkali metal reduction of pyrene structural and preparative aspects

摘要: Abstract Reduction of pyrene with alkali metals yields the corresponding dianion salts. The solvent, counterion and temperature must be carefully selected since side reactions such as protonation (e.g. in liquid ammonia) or cleavage etheral solvent occur readily. Moreover, spectroscopic characterization is complicated by rapid electron transfer processes. There no experimental evidence for distorted structures further reduction toward a tetraanion. Knowledge ionic π-structures essential an understanding reductive alkylation