Tetrakis­(tetra­methyl­ammonium) dodeca‐μ‐chloro‐hexa­chloro‐octahedro‐hexatantalate chloride

The title compound, (C₄H₁₂N)₄Ta₆Cl₁₈]Cl, crystallizes in the cubic space group . The crystal structure contains two different types of coordination polyhedra, i.e. four tetrahedral (CH₃)₄N]⁺ cations and one octahedral (Ta₆Cl₁₂)Cl₆]³⁻ cluster anion, and one Cl⁻ ion. The presence of three different kinds of Cl atoms bridging (μ₂), terminal and counter‐anion] in one mol­ecule makes this substance unique in the chemistry of hexanuclear halide clusters of niobium and tantalum. The Ta₆ octahedron has an ideal O_h symmetry, with a Ta—Ta interatomic distance of 2.9215 (7) Å.