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Synthesis of Cationic Cyclooctatetraene Uranium Complexes by Protonolysis of Borohydride Precursors: The First Cationic Organometallic Borohydride and the First Organometallic Dication of an f Element

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posted on 20.06.2000, 00:00 by Sophie M. Cendrowski-Guillaume, Monique Lance, Martine Nierlich, Michel Ephritikhine
Reaction of (COT)U(BH4)2(THF) (COT = η-C8H8, THF = tetrahydrofuran) with NEt3HBPh4 afforded [(COT)U(BH4)(THF)2][BPh4] (1), which further reacted with the ammonium salt in the presence of HMPA to give [(COT)U(HMPA)3][BPh4]2 (2); the crystal structure of a pyridine solvate of 2 has been determined.