Anion-ligand interaction in binuclear cyclic dimer complex of a tribenzo-S2O2 macrocycle with silver(I) picrate

From the reaction of tribenzo-S2O2 macrocyclic ligand (L1) and silver picrate (AgPic), a unique binuclear complex [Ag2(L1)2(Pic)2] (1) has been obtained. The species 1 has been characterised by single-crystal X-ray diffraction analysis providing a definitive proof of its cyclic dimer structure as well as the anion-ligand π-π stacking interactions between L1 and Pic−. The result of a comparative NMR experiment suggests that the solid structure of 1 is also retained in solution.