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The asymmetric unit of the title compound, [Ag(C 24 H 46 N 6 O 2 )](NO 3 ) 2 [C 24 H 46 N 6 O 2 is (5,16-dimethyl-2,6,13,17-tetra-aza-tri-cyclo-[16.4.0.0 7,12 ]docosane-2,13-di-yl)diacetamide, L ], consists of one independent half of the [Ag(C 24 H 46 N 6 O 2 )] 2+ cation and one nitrate anion. The Ag atom, lying on an inversion centre, has a square-planar geometry and the complex adopts a stable trans -III conformation. Inter-estingly, the two O atoms of the pendant acetamide groups are not coordinated to the Ag II ion. The longer distance of 2.227 (2) Å for Ag-N(tertiary) compared to 2.134 (2) Å for Ag-N(secondary) may be due to the effects of the attached acetamide group on the tertiary N atom. Two nitrate anions are very weakly bound to the Ag II ion in the axial sites and are further connected to the ligand of the cation by N-H⋯O hydrogen bonds. The crystal packing is stabilized by hydrogen-bonding inter-actions among the N-H donor groups of the macrocycle and its actetamide substituents, and the O atoms of the nitrate anions and of an acetamide group as the acceptor atoms.

acta crystallographica. section e, crystallographic communications

Crystal structure of [2,13-bis(acetamido)-5,16-dimethyl-2,6,13,17-tetraazatricyclo[16.4.0.07,12]docosane-κ4 N]silver(II) dinitrate from synchrotron X-ray data