New structural type in the chemistry of bismuth(III) polynuclear halide complexes: Synthesis and crystal structure of (H3O)3(diquat)6{[BiBr5]}6[BiBr6] • 2H2O

Resumo

Complex (H₃O)₃(diquat)₆{[BiBr₅]}₆[BiBr₆] • 2H₂O (I) has been prepared by the reaction between [BiBr₆]^3– and diaqua(1,1'-diethylene-2,2'-bipyridynium dibromide) in 2 M HBr and has been characterized by X-ray diffraction. The anionic part of compound I is formed by coordination polymeric anions {[BiBr₅]^–}_n built of {BiBr₆} octahedral blocks, which are joined by the μ²-bridge bromide ligands into infinite zigzag chains. The resulting complex belongs to new structural type among bismuth halide complexes.