Synthesis and Crystal Structure of Bis(N,N,N′,N′-tetramethyl-ethylenediammonium)decachlorodibismuthate(III) trihydrate

摘要

The synthesis and crystal structure are given for the bis(N,N,N′,N′-tetramethyl-ethylenediammonium)decachlorodibis-muthate(III) trihydrate salt. An X-ray investigation has shown that the title compound crystallizes in a non-centrosymmetric monoclinic system, space group C2 with the following lattice parameters: a = 13.535(4)Å, b = 14.893(5)Å, c = 10.158(4)Å, β = 121.54(3)°, V = 1745(1)Å3, Z = 2 and ρ_cal = 2.053 g cm-1. The structure was solved from 1921 independent reflections with R₁ = 0.0318 and wR₂ = 0.0743, and refined with 145 parameters. The structure shows a layer arrangement along the c-axis: planes of [Bi₂Cl₁₀]4- bioctahedra alternate with planes of [((CH₃)₂NH)₂(CH₂)₂]2+ dications. Since the [Bi₂Cl₁₀]4- anions are connected through O(W)-H…Cl hydrogen bonds (via water molecules), infinite unidimensional chains of composition [Bi₂Cl₁₀(H₂O)₃]_n4n- are formed in ae structure parallel to the c-axis. These chains are themselves interconnected by means of N-H…Cl bonds originating from the [((CH₃)₂NH)₂(CH₂)₂]2+ entities, forming a three-dimensional network.