Acta Cryst. (2007). E63, m1924  [ doi:10.1107/S1600536807027390 ]

A two-dimensional copper(II) molybdate, [{Cu₂(tpyprz)}Mo₈O₂₆] (tpyprz is 2,3,5,6-tetra-2-pyridyl-1,4-dihydropyrazine)

J. Zubieta and N. G. Armatas

Abstract: In the title compound, poly[₂-2,3,5,6-tetra-2-pyridyl-1,4-dihydropyrazine--hexacosaoxidooctamolybdato-dicopper(II)], [Cu₂Mo₈O₂₆(C₂₄H₁₆N₆)], the organic linker 2,3,5,6-tetra-2-pyridyl-1,4-dihydropyrazine (tpyprz) brings together four [Mo₈O₂₆]^4- clusters through the cationic bridge [Cu₂(tpyprz)]⁴⁺ to from a two-dimensional layer. The copper(II) cation is five-coordinate in a distorted square-pyramidal configuration, bonding to three N atoms from the tpyprz ligand and two terminal O atoms from the molybdenum cluster. The [Mo₈O₂₆]^4- cluster shows bonding only through the terminal O atoms attached to the octahedrally coordinated Mo atom along the central axis of the cluster.

Online 15 June 2007

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