Ammine(2,2′-bipyridine-κ²N,N′)silver(I) nitrate: a dimer formed by π–π stacking and ligand-unsupported Ag...Ag interactions

Abstract

Reaction of AgNO(3) and 2,2'-bipyridine (bipy) under ultrasonic treatment gave the title compound, [Ag(C(10)H(8)N(2))(NH(3))]NO(3). The crystal structure consists of dimers formed by two symmetry-related Ag(I)-bipy monomers connected through intra-dimer pi-pi stacking and ligand-unsupported Ag...Ag interactions. A crystallographic C2 axis passes through the mid-point of and is perpendicular to the Ag...Ag(i)(-x + 1, y, -z + 1/2) axis. In addition, each Ag(I) cation is coordinated by one chelating bipy ligand and one ammine ligand, giving a trigonal coordination environment capped by the symmetry-equivalent Ag atom. Molecules are assembled by Ag...Ag, pi-pi, hydrogen-bond (N-H...O and C-H...O) and weak Ag...pi interactions 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.

Synthesis and photophysical properties of multimetallic gold/zinc complexes of (P,N,N,N,P) and (P,N,N) ligands

“…The bond parameters (P-Au, Cl-Au, P-Au-Cl) of the P-Au-Cl units (1Au: 92,93 Compound 1Au forms dimers in the solid state via p-p stacking interactions between the heterocyclic aromatic rings in the solid state. 94 In the trinuclear complex 2Au 2 Zn, there are additional hydrogen bonds between the protons of the NH groups and the chloride ligands coordinated to the Zn 2+ cation that are stabilizing the whole structure. In ESI-MS experiments performed with 2Au 2 Zn, a chloride anion is cleaved first from the complex to generate [2Au 2 Zn:-Cl] + .…”