Coordination polymer of cadmium(II) iodide with tetramethylpyrazine

Compound [CdI₂(Me₄Pyz)] is synthesized by the reaction of CdI₂ with tetramethylpyrazine (Me₄Pyz, C₈H₁₂N₂), and its structure is determined (CIF file CCDC 1538646). The crystals are monoclinic, space group C2/c, a = 14.732(3), b = 11.084(2), c = 7.792(2) Å, ß = 95.27(3)°, V = 1267.0(4) Å, ?_calcd = 2.634 g/cm³, Z = 4. Polymer chains [CdI₂(Me₄Pyz)]_221e extended along the direction [001] are formed in the structure of the complex due to the bridging iodine atoms. The coordination polyhedron of the Cd²⁺ ion is a trigonal bipyramid with four bridging iodine atoms and one nitrogen atom of the organic ligand lying in the equatorial plane along with two iodine atoms. The distance between the cadmium atoms in the chain is 4.155 Å.