CRYSTAL-STRUCTURE OF A CARBAMIDE COMPLEX OF CADMIUM IODIDE CDI2-CENTER-DOT-2CO(NH2)(2)

The X-ray crystal structure of the CdI2 . 2CO(NH2) complex is reported . The crystals are monoclinic; a = 24.213(8), b = 17.626(2), and c = 7 .823(1) Angstrom; beta = 98.87(2)degrees, Z = 12, and sp. gr. C2/c. Th ere are two kinds of cadmium atoms: a tetrahedrally coordinated Cd(1) atom that occupies a general site and is included in a [CdI3](infinity )(-) anionic chain, and a Cd(2) atom situated at a twofold axis and co ordinated octahedrally by the carbamide molecules. Thus, the compositi on of the crystal is given by the formula [Cd(OCN2H4)(6)][CdI3](2). On e of the three independent carbamide ligands is disordered. Within the systematic study of carbamide complexes of metals [1-4], we performed the X-ray structure analysis of the complex CdI2 . 2CO(NH2)(2) (I) wi th the known unit-cell parameters and space group [5].