Journal
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
Volume 631, Issue 6-7, Pages 1075-1078Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/zaac.200400500
Keywords
tricyanomethanide; lanthanum; synthesis; structure
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KLa[C(CN)(3)](4)-H2O was crystallized from an aqueous solution containing La(NO3)(3)-6H(2)O and K[C(CN)(3)]. The crystal structure was solved and refined from X-ray single crystal data (P4/n, Z = 2, a = b = 12.379(1) angstrom, c = 6.5695(8) angstrom, V = 1006.7(2) angstrom(3)). Solid KLa[C(CN)(3)](4)-H2O forms a framework structure with bridging tricyanomethanide ions, each of them connecting two La3+ ions and one K+ ion. Potassium is apparently situated in a tetrahedral environment with four K-N distances of 2.741(3) angstrom, shielded by four other tricyanomethanide ions. Each La3+ has a square antiprismatic coordination of nitrogen atoms from eight [C(CN)(3)](-) ions, and this antiprism is mono-capped by one water molecule.
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