About the stability of trimeric beryllium hydroxide scorpionate complexes

The controlled hydrolysis of TpBeCl {Tp = trispyrazolylborate [HB(C3N2H3)3]} with H2O and D2O in the presence of N,N‐diisopropylethylamine (DIPEA) yields the trimeric beryllium hydroxide scorpionate complexes [Be3(µ‐OX)3(Tp)3] (X = H: 1, D: 2) quantitatively. The complexes contain six‐membered Be3O3 rings according to single‐crystal X‐ray diffraction studies and theoretical calculations. Temperature‐dependent 1H and 9Be NMR spectroscopy established that 1 has a dynamic structure in solution. In addition, the structure of [Be3(µ‐OH)3(Br)3(thf)6], which was obtained from hydrolysis of a solution of BeBr2 in tetrahydrofuran and CHCl3, is reported.


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