Tetrakis(1H-benzimidazole-κN3)(nitrato-κO)copper(II) nitrate

Tetrakis(1H-benzimidazole-κN3)(nitrato-κO)copper(II) nitrate

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In the title salt, [Cu(NO3)(C7H6N2)4]NO3, one nitrate anion is coordinated to the CuII atom, which is also coordinated by the N atoms of four N-heterocycles.The Building Set geometry at the metal atom is a square pyramid in which the O atom of the anion occupies the apical position [Cu—O = 2.468 (5) and 2.

590 (7) Å in the two independent formula units].The cation lies on a twofold rotation axis; the coordinated nitrate anion is also disordered about this symmetry element.The lattice anion is also Crop Tee disordered about a twofold rotation axis.

In the crystal, the cations are linked to the coordinated and free anions by N—H.O hydrogen bonds.