Anions of hydrocarbons are rare, and dianions of hydrocarbons are extremely rare. The following hydrocarbon reacts with two equivalents of butyllithium to form a dianion of formula [C8H6]2-. Propose a structure for this dianion, and suggest why it forms so readily.

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Н. [C,H,F- (Li"), 2 C,H,Li 2 С.Нo