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The cationic uranium amide compound [U(cp*)2(NMe2)(thf)][BPh4](cp*=η-C5Me5) reacts with tetrahydrofuran (thf) in the presence of free amine as catalyst to give the heterocyclic metallacycle [(cp*)2[graphic omitted])][BPh4]·0.5thf; the crystal structure of the pyridine solvate determined.
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Boisson et al. (1996) studied this question.
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