Axial Interactions of Nitrate Ions to a Silver(II) Ion Supported by C-H···O Hydrogen Bonds in a Silver(II) Tetraazamacrocyclic Complex

The complex was obtained by reacting the macrocycle and AgNO₃ in MeOH/H₂O. The complex exhibits a 1D supramolecular polymer, where the chain is formed by hydrogen bonds between the two sets of pre-organized N-H groups of the macrocycle, nitrate ions and lattice water molecules. Space-filling and lattice diagrams of illustrating the supramolecular chain by hydrogen bonds are described in Figure 2. The coordination environment around the central Ag(II) ion is a square plane with four Ag-N bonds from the macrocycle. The Ag(II) ion sits on an inversion center. Tetraazamacrocycles and first synthesized by Kang et al., which are two of the 16 possible diastereoisomers of L have long been used for the preparation of many interesting metal complexes. Although the macrocycles and show similar coordination tendencies to metal ions and form corresponding metal complexes, the chemical and structural properties of metal complexes are greatly influenced by the stereochemistry of cyclohexane rings fused on the 14-membered tetraazamacro-cycle