Bis(1-methylpiperazine-1,4-diium)di-μ-bromido- bis[tetrabromidobismuthate(III)] dihydrate

Abstract

In the title hydrated salt, (C5H14N2) 2[Bi2Br10]·2H2O, the complete [Bi2Br10]4- bioctahedron is generated by crystallographic inversion symmetry. The diprotonated piperazine ring adopts a chair conformation, with the methyl group occupying an equatorial position. In the crystal, the tetraanions and water molecules are linked by O-H⋯Br and O-H⋯(Br,Br) hydrogen bonds to generate [100] chains. The chains are crosslinked by N-H⋯Br, N-H⋯O and C-H⋯Br hydrogen bonds originating from the piperazinediium dications, thereby forming a three-dimensional network.