Investigation of the crystal structures of new cyano-bridged compounds with KLaMo(CN)89H2O structure type

 

Chem. Met. Alloys 7 (2014) 112-118

 

Dariya Semenyshyn, Roman Gladyshevskii, Helen Stoeckli-Evans, Iryna Typilo, Olha Sereda

 

The crystal structures of KLaW(CN)89H2O (I) and KNdW(CN)89H2O (II), isostructural with KLaMo(CN)89H2O, have been solved from X-ray single-crystal diffraction data. The compounds crystallize in the monoclinic system, space group P21/c (I: a = 8.7692(4), b = 25.2705(11), c = 10.7017(5) Å, β = 117.004(3)º, = 2112.96(17) Å3, Ζ = 4, Dx = 2.302 gcm-3, R1 = 0.0440 and wR2 = 0.1012 for 3988 independent reflections; II: a = 8.7425(4), b = 25.1085(11), c = 10.6210(5) Å, β = 117.218(3)º, = 2073.27(17) Å3, Ζ = 4, Dx = 2.363 gcm-3, R1 = 0.0400 and wR2 = 0.0893 for 3916 independent reflections). The coordination polyhedra of the tungsten atoms are [W(CN)8]4 square antiprisms, whereas the [LnN4(H2O)5]3+ (Ln = La, Nd) polyhedra can be described as tricapped trigonal prisms or monocapped square antiprisms; the potassium atoms center distorted monocapped trigonal prisms, [KN3(OH2)4]. The formula of the coordination polymer can be written as {[K(H2O)2][Ln(H2O)5][W(CN)8]}n2nH2O, Ln = La, Nd.

 

 

Coordination polyhedra in the structure of {[K(H2O)2][Ln(H2O)5][W(CN)8]}n2nH2O.

 

Keywords

Potassium / Lanthanum / Neodymium / Octacyanotungstate(ΙV) / Crystal structure