Crystal structure of a [CsK2(μ3-DMF)2(μ-DMF)3(DMF)4][{Re6(μ3-Se)8}Br6] cluster complex

Abstract

A cluster complex of the composition [CsK₂(μ₃-DMF)₂(μ-DMF)₃(DMF)₄][{Re₆(μ₃-Se)₈}Br₆] is obtained by the reaction of K₄[{Re₆(μ₃-Se)₈}(OH)₆]·8H₂O with hydrobromic acid in the presence of CsBr and its subsequent crystallization by diethyl ether diffusion in a dimethylformamide solution. The compound crystallizes in the triclinic space group P1̅, with the following unit cell parameters: a = 13.6169(3) Å, b = 14.7584(4) Å, c = 18.1573(4) Å, α = 103.332(1)°, β = 108.250(1)°, γ = 97.371(1)°, V = 3286.55(14) ų, Z = 2, d_calc = 3.130 g/cm³. The crystal structure is built of [{Re₆Se₈}Br₆]^3– anionic cluster complexes and complex [CsK₂(μ₃-DMF)₂(μ-DMF)₃(DMF)₄]³⁺ cations.