Abstract

Active uranium, prepared in hydrocarbon solvents from UCl 4 and [(TMEDA)Li] 2[naphthalene] is a novel reducing agent. The unprecedented stepwise reduction of benzil and benzoin to bibenzyl has been shwon to proceed via the unsaturated species diphenylacetylene, cis-stilbene, and trans-stilbene. Active uranium also effects oligomerizations of diphenylacetylene and trans-stilbene.

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