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In the title compound, [Cu(C 11 H 13 N 3 ) 2 ](NO 3 ) 2 ·2H 2 O, synthesized by hydro­thermal reaction of Cu(NO 3 ) 2  and racemic 2-(pyrrolidin-2-yl)-1 H -1,3-benzimidazole, the Cu II  atom lies on an inversion centre. The distorted octa­hedral Cu II  environment contains two planar  trans -related  N , N -chelating 2-(pyrrolidin-2-yl)-1 H -1,3-benzimidazole ligands in the equatorial plane and two monodentate nitrate anions, which are in weak inter­action with the Cu atom, in the axial positions. The two benzimidazole ligands have opposite configurations ( R / S  and  S / R ) and compound is a  meso  complex. In the crystal, N—H⋯O and O—H⋯O hydrogen bonds generate an infinite three-dimensional network. One methylene group of the pyrrolidine ring is disordered over two position with a 0.56 (3):0.44 (3) occupancy.

Bis[2-(pyrrolidin-2-yl)-1H-benzimidazole-κ2N2,N3]copper(II) dinitrate dihydrate

Bis[2-(pyrrolidin-2-yl)-1H-benzimidazole-κ²N²,N³]copper(II) dinitrate dihydrate