Synthesis and characterization of silver(I) saccharinate complexes with pyrazole and imidazole ligands: [Ag(sac)(pz)(H2O)](n) and [Ag(sac)(im)] center dot 2H(2)O

Abstract

Two new silver(I) saccharinate (sac) complexes, [Ag(sac)(pz)(H2O)](n) (1) and [Ag(sac)(im)]center dot 2H(2)O (2) (pz=pyrazole and im=imidazole), have been prepared and characterized by elemental analysis, IR spectroscopy, thermal analysis and single crystal X-ray diffraction. Complexes 1 and 2 crystallize in the monoclinic space group P2(1)/c and triclinic space group P (1) over bar, respectively. The sac, pz and im ligands all are N-coordinated. In 1, the [Ag(sac)(pz)] units are bridged by aqua ligands to generate a one-dimensional helical chain, in which the silver(l) ions exhibit a distorted square-planar AgN2O2 coordination geometry. The polymeric chains are connected by N-H center dot center dot center dot O hydrogen bonds into sheets, which are further linked by aromatic pi(pz)center dot center dot center dot pi(sac) stacking interactions into a three-dimensional supramolecular network. Complex 2 consists of individual molecules containing linearly coordinated silver(I) ions with a slightly distorted coordination of AgN2. The molecules interact with each other through hydrogen bonds and pi center dot center dot center dot pi interactions to form a three-dimensional supramolecular network.