Research Article: catena-Poly[[tetra­kis­(1H-pyrazole-κN2)copper(II)]-μ-hexa­fluoridosilicato-κ2F:F′]

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Hui Li, Qiuping Han, Xiaochuan Chai, Jian Wang, Chenzhong Yao.


In the title one-dimensional coordination polymer, [Cu(SiF6)(C3H4N2)4]n, the CuII atom is coordinated by two hexafluoridosilicate F atoms and four pyrazole N atoms in a distorted trans-CuF2N4 octa­hedral environment. The dihedral angle between the planes of the pyrazlole rings in the asymmetric unit is 74.4 (3)°. The hexa­fluoridosilicate dianion acts as a bridging ligand, connecting the CuII atoms into a [1-10] chain. The Cu and Si atoms lie on special positions with 2/m site symmetry. In the crystal, intra­chain N—H⋯F hydrogen bonds occur and weak C—H⋯F inter­actions link the chains.

Partial Text

For background to coordination polymers with nitro­gen-containing ligands, see: Li et al. (2011 ▶).