Investigation of the crystal structures
of new cyano-bridged compounds with KLaMo(CN)8·9H2O
structure type
Chem.
Met. Alloys 7 (2014) 112-118
https://doi.org/10.30970/cma7.0292
Dariya Semenyshyn, Roman Gladyshevskii,
Helen Stoeckli-Evans, Iryna
Typilo,
Olha Sereda
The crystal structures of KLaW(CN)8·9H2O
(I) and KNdW(CN)8·9H2O
(II), isostructural with KLaMo(CN)8·9H2O, 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,
V = 2112.96(17) Å3,
Ζ = 4, Dx = 2.302
g·cm-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,
V = 2073.27(17) Å3,
Ζ = 4, Dx = 2.363
g·cm-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]}n·2nH2O, Ln = La, Nd.
Coordination polyhedra
in the structure of {[K(H2O)2][Ln(H2O)5][W(CN)8]}n·2nH2O.
Keywords
Potassium /
Lanthanum / Neodymium / Octacyanotungstate(ΙV) / Crystal structure