Received 22 March 2013
In the binuclear title complex, [Cu2(ClO4)1.5(NO3)1.5(C18H16N6Se)(H2O)5]NO3·H2O, both CuII ions are hexacoordinated by O and N atoms, thus forming axially elongated CuO4N2 octahedra. The equatorial plane of each octahedron is formed by one chelating pyrazole-pyridine fragment of the organic ligand and two water molecules. The axial positions in one octahedron are occupied by a water molecule and a monodentately coordinated perchlorate anion, while those in the other are occupied by a nitrate anion and a disordered perchlorate/nitrate anion with equal site occupancy. The pyrazole-pyridine units of the organic selenide are trans-oriented to each other with a C-Se-C angle of 96.01 (14)°. In the crystal, uncoordinated nitrate anions and the coordinating water molecules are involved in O-HO and N-HO hydrogen bonds, forming a bridge between the pyrazole group and the coordinating water molecules. Further O-HO hydrogen bonds between the complex molecules and a - stacking interaction with a centroid-centroid distance of 3.834 (4) Å are also observed.
For structural studies of related pyrazolylselenides, see: Seredyuk et al. (2010) and for structural studies of d-metal complexes of bis(3,5-dimethyl-1H-pyrazol-4-yl)selenide, see: Seredyuk et al. (2007). For related structures, see: Fritsky et al. (2004); Kanderal et al. (2005); Moroz et al. (2010).
Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2009); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IS5261 ).
The financial support from the State Fund for Fundamental Researches of Ukraine (grant No. F40.3/041) and the Swedish Institute (Visby Program) is gratefully acknowledged. MS thanks the EU for a Marie Curie fellowship (IIF-253254).
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