Date Published: July 01, 2011
Publisher: International Union of Crystallography
Author(s): Run-Qiang Zhu.
In the title compound, [Cu(NO2)2(C5H8N2)]·2H2O, the Cu2+ ion exhibits site symmetry 2 and is hexacoordinated by four O atoms from two nitrite ions and two N atoms from two 2-ethyl-1H-imidazole molecules. A free water molecule assists in forming a three-dimensional network holding together the complexes via O—H⋯N, O—H⋯O and N—H⋯O hydrogen bonds.
For general background on ferroelectric compounds with metal–organic framework structures, see: Fu et al. (2009 ▶); Ye et al. (2006 ▶); Zhang et al. (2008 ▶, 2010 ▶). For graph-set motifs of hydrogen bonds, see: Bernstein et al. (1995 ▶).