Spontaneous ion separation of the scorpionate beryllium complex, TpBel 1 (Tp = 1-trispyrazolylborate), occurs upon treatment with THF, yielding (TpBe(thf)]I 2, which was characterized by hetero-nuclear NMR spectroscopy (H-1, Be-9, C-13) and structurally characterized by single crystal X-ray diffraction. 2 represents a rare example of a structurally characterized monocationic beryllium complex, and to the best of our knowledge, the synthesis of 2 by a solvent-induced ion separation has previously only been observed in the reactions of beryllium dihalides with strong Lewis bases.
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