Acta Cryst. (2007). E63, i162  [ doi:10.1107/S1600536807029133 ]

Poly[triaquahexa--cyanido-terbium(III)trisilver(I)]: a 4f-4d bimetallic coordination polymer

K. Kalachnikova, Z. Assefa and R. E. Sykora

Abstract: The title compound, [Ag₃Tb(CN)₆(H₂O)₃]_n, consists of hydrated Tb³⁺ cations that are linked with dicyanoargentate anions into a three-dimensional network. The resultant TbN₆O₃ coordination polyhedra have a tricapped trigonal prismatic geometry. Six N atoms from the dicyanoargentate groups form the corners of the trigonal prisms, while the O atoms of three water molecules reside in the capping positions to complete the coordination environment around terbium. Argentophilic interactions give rise to a two-dimensional network of Ag atoms. All of the atoms in the structure are located on special crystallographic positions. Only one unique atom of each type is found in the structure. The site symmetry of each is: Tb (2m), Ag (2/m), C (m), N (m), O (m2m) and H (m).

Online 20 June 2007

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