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The Cu II  atom in the title compound, [Cu(NO 3 ) 2 (C 20 H 40 N 4 )], is  N , N ′, N ′′, N ′′′-chelated by the macrocyclic ligand: the four N atoms form a square, above and below which are located the O atoms of the nitrate ions. The metal atom exists in a tetra­gonally distorted octa­hedron, on a special position ofsite symmetry. One of the amino groups is hydrogen bonded to an O atom of the nitrate ion. The other amino group is hydrogen bonded to O atom of an adjacent mol­ecule, generating a supra­molecular dimeric hydrogen-bonded dinuclear aggregate.

acta crystallographica. section e

{3,14-Dimethyl-2,6,13,17-tetraazatricyclo[16.4.0.07,12]docosane-κ4N,N′,N′′,N′′′)bis(nitrato-κO)copper(II)