Refinement of the crystal
structure of potassium octacyanomolybdate(IV) dihydrate
Chem.
Met. Alloys 3 (2010) 49-52
https://doi.org/10.30970/cma3.0122
Iryna TYPILO, Olha SEREDA, Helen STOECKLI-EVANS,
Roman GLADYSHEVSKII,
Dariya SEMENYSHYN
X-ray diffraction on single crystal
was used to refine the crystal structure of K4[Mo(CN)8]×2H2O. For the first time the positions of
all hydrogen atoms in the complex were localized, the crystal structure being
determined at temperature 173 K. The compound
crystallizes in the orthorombic system, space group Pnma, cell
parameters: a = 16.6959(10), b = 11.6090(6), c = 8.6796(6) Å, V = 1682.30(18) Å3, Z = 4, Dx = 1.961 g·cm-3, number of independent reflections 2365, reliability factors
R = 0.0329, wR = 0.0590. The coordination
polyhedron of the molybdenum atoms is a dodecahedron [Mo(CN)8]. The potassium atoms have three different deformed polyhedra: trigonal bipyramid [K1N4OH2], tetragonal pyramid [K2N5]
and trigonal prism with one additional atom [K3N5(OH2)2].
All cyanogroups in the complex are terminal.
Projection of the structure of K4[Mo(CN)8]×2H2O along [001].
Keywords
Potassium octacyanomolybdate(IV) /
Crystal structure / X-ray diffraction