Collect. Czech. Chem. Commun. 1987, 52, 1915-1921

The crystallochemistry of tetracyanocomplexes. The crystal and molecular structure of Cd(NH3)2Ni(CN)4.0·5 H2O

Charles Kappensteina and Juraj Černákb

a Department of Inorganic Chemistry, Poitiers University, Avenue du Recteur Pineau 40, 86022 Poitiers Cedex, France
b Department of Inorganic Chemistry, P. J. Šafárik University, 041 54 Košice, Czechoslovakia


Cd(NH3)2Ni(CN)4.0·5 H2O is orthorhombic, Imma, with parameters a = 0·7622(4), b = 1·4992(13), c = 0·8961(6) nm, Z = 4, d(exp) = 2·07(4), d(calc.) = 2·066 Mg m-3. The structure, which was refined by the least squares method to R = 0·038 for 1 508 independent reflections, is isostructural with Ni(NH3)2Ni(CN)4.0·5 H2O and consists of infinite layers of the [Cd(NC)4Ni] type. Two water molecules in the unit cell occupy 4 equivalent positions between the layers. The shortest intermolecular distances 0·3023(2) (H2O···Ni) and 0·3371(1) nm (H2O···NH3) indicate zeolitic character of the water molecule.