Reactions of 2, 3-dimethylenebutadiene dianion 1 with monofunctional electrophiles were found to provide the best routes to symmetrically substituted 1, 3-butadienes such as 2c-n. Evidence that at least some of these reactions go by single electron-transfer mechanisms is presented. Possible mechanisms for the formation of some unusual byproducts are discussed. Reactions of 1 with dichlorides and dibromides were found to provide the best ...
