Acta Cryst. (2007). E63, m2053  [ doi:10.1107/S1600536807031108 ]

Jahn-Teller distorted copper(II) in poly[bis(-4,4'-bipyridine)tetra--cyanido-copper(II)disilver(I)]

J. Maher and R. E. Sykora

Abstract: The title compound, [Ag₂Cu(CN)₄(C₁₀H₈N₂)₂]_n, contains a three-dimensional doubly penetrating framework structure composed of copper(II) bridged by 4,4'-bipyridine and dicyanoargentate groups. The Cu atom is located on an inversion center and is coordinated by six N atoms in a distorted tetragonal-bipyramidal geometry as a result of a significant Jahn-Teller distortion. The equatorial plane of Cu is coordinated by two bridging bipyridine ligands and two N-bound dicyanoargentate anions, while the axial positions are occupied by two N atoms from bridging dicyanoargentate anions. A three-coordinate Ag atom is present, due to two Ag-C bonds and one longer Ag-N interaction.

Online 5 July 2007

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