STRUCTURE OF A 4-1 ADDUCT OF CADMIUM(II) CHLORIDE WITH 15-CROWN-5 ETHER

Cadmium(II) chloride-1,4,7,10,13-pentaoxacyclopentadecane-water 4/1/1, C10H20Cd4Cl8O5.H2O, M(r) = 971.55, orthorhombic, Pnma, a = 10.224 (2), b = 11.353 (2), c = 25.146 (6) angstrom, V = 2919 (1) angstrom3, Z = 4, D(x) = 2.211 Mg m-3, Mo K-alpha (lambda = 0.71073 angstrom), mu = 3.63 mm-1, F(000) = 1832, T = 295 K, R(F) = 0.056 for 1009 reflexions [I > 3-sigma(I)] and 137 variables. The structure contains double chains built of CdCl6 and CdCl5H2O octahedra each sharing three edges. Adjacent unshared Cl atoms are linked by Cd atoms which are themselves coordinated to crown-ether molecules. Cd--Cl distances are 2.535 (7) to 2.586 (7) angstrom for Cl atoms which are shared between two Cd atoms and 2.629 (7) to 2.759 (6) angstrom for those shared by three.