Ammine(2,2′-bipyridine-κ2 N,N′)silver(I) nitrate: A dimer formed by π-π Stacking and ligand-unsupported Ag⋯Ag inter-actions

Abstract

Reaction of AgNO3 and 2,2′-bipyridine (bipy) under ultrasonic treatment gave the title compound, [Ag(C10H 8N2)(NH3)]NO3. The crystal structure consists of dimers formed by two symmetry-related AgI-bipy monomers connected through intra-dimer π-π stacking and ligand-unsupported Ag⋯Ag inter-actions. A crystallographic C2 axis passes through the mid-point of and is perpendicular to the Ag⋯Agi(-x + 1, y,-z + 1/2) axis. In addition, each AgI cation is coordinated by one chelating bipy ligand and one ammine ligand, giving a trigonal coordination environment capped by the symmetry-equivalent Ag atom. Mol-ecules are assembled by Ag⋯Ag, π-π, hydrogen-bond (N-H⋯O and C-H⋯O) and weak Ag⋯π inter-actions into a three-dimensional framework. Comparing the products synthesized under different mechanical treatments, we found that reaction conditions have a significant influence on the resulting structures. The luminescence properties of the title compound are also discussed. © 2010 International Union of Crystallography.