Abstract
The crystal structure of KLaMo(CN)8 · 9H2O was determined from X-ray diffraction data. The crystals are monoclinic, space group P21/c, a = 8.7451(4), b = 25.2761(13), c = 10.6744(5) A, β = 117.059(3)°, V = 2101.22(17) A3, Z = 4, ρ(calcd) = 2.037 g/cm3, R = 0.0242, wR 2 = 0.0500 for 5656 independent reflections. The coordination polyhedra of the Mo, La, and K atoms are the tetragonal antiprism [Mo(CN)8], the monocapped tetragonal antiprism [La(NC)4(OH2)5], and the strongly distorted monocapped trigonal prism [K(NC)3(OH2)4], respectively. The La and K atoms are N-linked by seven bridging cyano groups to form double layers with two sandwiched uncoordinated water molecules and the sandwiched terminal CN group. The complex can be formulated as “[K(H2O)2][La(H2O)5][Mo(CN)8]” n · 2nH2O.
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