trans-Bis(cyanamidonitrato-N:O)bis(imidazole-N³)copper(II), [Cu(CN₃O₂)₂(C₃H₄N₂)₂]

The structure of the title compound consists of one-dimensional polymeric chains extending along the c direction. They are formed by linking [Cu(NCNNO₂)₂(iz)₂] (iz is imidazole) units together. The cyanamidonitrate anions act as bidentate bridging ligands, with a short Cu-N(nitrile) bond of 2.011 (2) Å in the equatorial plane and a long axial Cu-O bond of 2.687 (3) Å. The Cu atom is located on a centre of symmetry and is pseudo-octahedrally coordinated by two trans N(imidazole) atoms [Cu-N 1.936 (2) Å] and two nitrile N atoms, and by two axial O atoms from cyanamidonitrite ligands.

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