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) A, s = 95.27(3)°, V = 1267.0(4) A, ?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 A.