Research Article: catena-Poly[[tetra­aqua­copper(II)]-μ-pyrazine-2-carboxamide-κ3N4:N1,O-[bis­(sulfato-κO)copper(II)]-μ-pyrazine-2-carboxamide-κ3N1,O:N4]

Date Published: August 01, 2012

Publisher: International Union of Crystallography

Author(s): Sadif A. Shirvan, Sara Haydari Dezfuli.


In the crystal of the title polymeric compound, [Cu2(SO4)2(C5H5N3O)2(H2O)4]n, two independent CuII atoms are located on individual inversion centers. One CuII atom is coordinated by four water mol­ecules and two pyrazine-2-carboxamide ligands in a distorted O4N2 octa­hedral geometry; the other is N,O-chelated by two pyrazine-2-carboxamide ligands and further coordinated by two sulfate anions in a distorted O4N2 octa­hedral geometry. The pyrazine-2-carboxamide ligands bridge the CuII atoms to form a polymeric chain running along [110]. The crystal structure features N—H⋯O, O—H⋯O and weak C—H⋯O hydrogen bonds.

Partial Text

For related structures, see: Abu-Youssef et al. (2006 ▶); Azhdari Tehrani et al. (2010 ▶); Goher & Mautner (2000 ▶); Kristiansson (2002 ▶); Mir Mohammad Sadegh et al. (2010 ▶); Munakata et al. (1997 ▶); Pacigova et al. (2008 ▶); Shirvan & Haydari Dezfuli (2012a ▶,b ▶,c ▶).




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