New Silver(I) Complexes of Pyridyl Dithioether Ligands with Ag–Ag Interactions: Effects of Anions and Ligand Spacers on the Framework Formations of Complexes

Abstract

Three new silver(I) complexes existing Ag–Ag interactions, a trinuclear cluster complex [Ag3(L1)2(NO3)2](NO3) 1, a dinuclear complex [Ag2(L1)2](PF6)22 and a one-dimensional chain complex [Ag2L2(NO3)2]∞3, where L1 and L2 are two structurally related pyridyl dithioether ligands, bis(2-pyridylthio)methane (L1) and 1,3-bis(2-pyridylthio)-propane (L2), have been synthesized and their structures were determined by single-crystal X-ray diffraction analysis. The striking structural differences of 1 and 2 suggest that counter anions have a profound effect upon the framework formations of silver complexes with pyridyl dithioether ligands, and the differences of 1 and 3 indicate that the subtle changes of the space groups have great influence on the coordination modes of the terminal pyridylsulfanyl groups and the geometries of AgI ion and therefore greatly influence the structures of their complexes. The weak Ag⋅⋅⋅O interactions in the trinuclear complex 1 and the one-dimensinoal chain complex 3 extend them into quasi two-dimensional networks, and the Ag⋅⋅⋅S weak interactions in the dinuclear complex 2 into one-dimensinoal chains, and such weak interactions further stabilized these complexes.