Abstract
AbstractThe reaction of 3,5‐dinitrobenzenecarboxylic acid with triphenylbismuth in a 1:1 stoichiometric ratio in toluene under reflux afforded two new Bi38 oxocarboxylate cages [Bi38(μ3‐O)22(μ4‐O)22(μ6‐O){3,5‐(NO2)2C6H3COO}20(OH)4(DMSO)16]·4DMSO·11H2O (1, DMSO = dimethyl sulfoxide) and [Bi38(μ3‐O)22(μ4‐O)22(μ6‐O){3,5‐(NO2)2C6H3COO}20(CH3COO)2(OH)2(DMF)10]·15DMF·20H2O (2, DMF = N,N‐dimethylformamide), which were obtained under different crystallization conditions. Compounds 1 and 2 are built from the coordination action of carboxylato, hydroxido, and oxido ligands and neutral solvent molecules. A detailed structural analysis of 1 reveals that the center of the core contains a {Bi6} octahedron, a Platonic polyhedron, which is encapsulated by another Platonic solid, viz., a {Bi8} cube. This entire assembly is further encapsulated by a truncated octahedral {Bi24} cage; the latter is an Archimedean solid. This structural arrangement of 1 classifies it along with Bi38 oxo cages as Keplerates, a structural family to which very few main‐group‐element‐containing compounds belong.
Published Version
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