Received 19 July 2010
In the crystal structure of the title compound, [Zn3(NCSe)4(OH)(CN)(C4H4N2)4]n one of the two crystallographically independent zinc(II) cations is coordinated by two terminal N-bonded selenocyanato anions and two N atoms of two symmetry-related pyridazine ligands in a trigonal-bipyramidal geometry, while the other zinc(II) cation is coordinated by one terminal N-bonded selenocyanato anion, one -1,2-cyanido anion and three N atoms of three crystallographically independent pyridazine ligands in a slightly distorted octahedral coordination geometry. The zinc(II) atoms are further connected via a 3-hydroxido anion into trinuclear building blocks. The formula unit consists of three zinc cations, four selenocyanato anions, one 3-hydroxido anion, four pyridazine molecules as well as one cyanido anion. The asymmetric unit contains half of a formula unit. One of the zinc atoms, two selenocyanato anions, two pyridazine ligands and the 3-hydroxido anion are located on a crystallographic mirror plane, whereas the cyanido anion is located on a twofold rotation axis. Therefore, this anion is disordered due to symmetry. The cyanido anions connect the metal centres into polymeric zigzag chains propagating along the a axis.
For related 3-hydroxo Zn coordination, see: Alexiou et al. (2005); Jana et al. (2006). For general background to inorganic-organic coordination polymers based on zinc(II) halides or pseudohalides and N-donor ligands, see: Näther et al. (2007); Bhosekar et al. (2006).
Data collection: X-AREA (Stoe, 2008); cell refinement: X-AREA; data reduction: X-AREA; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 2010); software used to prepare material for publication: XCIF in SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BT5302 ).
We gratefully acknowledge financial support by the State of Schleswig-Holstein and the Deutsche Forschungsgemeinschaft (Project 720/3-1). We thank Professor Dr Wolfgang Bensch for access to his experimental facility.
Alexiou, M., Katsoulakou, E., Dendrinou-Samara, C., Raptopoulou, C. P., Psycharis, V., Manessi-Zoupa, E., Perlepes, S. P. & Kessissoglou, D. P. (2005). Eur. J. Inorg. Chem. pp. 1964-1968.
Bhosekar, G., Jess, I. & Näther, C. (2006). Acta Cryst. E62, m1859-m1860.
Brandenburg, K. (2010). DIAMOND. Crystal Impact GbR, Bonn, Germany
Flack, H. D. (1983). Acta Cryst. A39, 876-881.
Jana, S., Fröhlich, R. & Mitzel, N. W. (2006). Chem. Eur. J. 12, 592-599.
Näther, C., Bhosekar, G. & Jess, I. (2007). Eur. J. Inorg. Chem. pp. 5353-5359.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Stoe (2008). X-AREA, X-RED32 and X-SHAPE. Stoe & Cie, Darmstadt, Germany.