Acta Cryst. (2006). E62, m394-m396  [ doi:10.1107/S1600536806002522 ]

Tris(ethylenediamine)nickel(II) tetraiodocadmate(II)

M. Sohail, K. C. Molloy, M. Mazhar, G. Kociok-Köhn and M. K. Khosa

Abstract: The title compound, [Ni(C₆H₂₄N₆)][CdI₄], contains two discrete ions, an [Ni(en)₃]²⁺ (en = ethylenediamine) cation and a [CdI₄]^2- anion. The Ni²⁺ ion is coordinated by three chelating ethylenediamine ligands in a distorted octahedral geometry while the Cd²⁺ ion binds four iodide ions in a slightly distorted tetrahedron. Both the Ni and Cd atoms lie on threefold axes of rotation. The structure is disordered at cadmium, with two alternative sites for the metal in a 97:3 ratio; the minor component of the disorder inverts the CdI₄ tetrahedron and reverses the direction of propagation of the aligned [CdI₄]_n^2- units.

Online 31 January 2006

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