Synthesis and structural characterization of the first examples of molecular aggregates of barium supported by aryloxide and alkoxide ligands: [HBa5(O)(OPh)9(thf)8] and [H3Ba6(O)(OBut)11(OCEt2CH2O)(thf)3](thf = tetrahydrofuran)

Abstract
The reaction of barium granules in tetrahydrofuran with either phenol or t-butyl alcohol yields phenoxide and t-butoxide aggregates that have been characterized in the crystalline state; they share a number of novel structural features, including the presence of a square-based pyramidal core Ba55-O) supported by µ3 and µ2 phenoxide or butoxide ligands.

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