Synthese, Kristallstruktur und Eigenschaften von Vanadium(II)‐tetrachloroaluminat

Abstract

Synthesis, Crystal Structure, and Properties of Vanadium(II) Tetrachloroaluminate The reaction of vanadium dichloride and aluminium trichloride yields vanadium(II) tetrachloroaluminate. Amber cuboid crystals can be obtained by slow cooling of the melt. V(AlCl4)2 crystallizes in the monoclinic space group I2/c (a = 1284.6(3), b = 776.3(2), c = 1163.5(2) pm, β = 92.376(10)°) and is therefore isotypic to Co(AlCl4)2. The structure contains chains build of VCl6 octahedra and AlCl4 tetrahedra sharing corners and edges with each other. The temperature dependence of the magnetic susceptibility follows Curie‐Weiss behaviour (μ = 3.88(2) μB, Θ = −9(1) K) complying with the spin‐only paramagnetism expected of d3 ions.