A Rigid Angular Bidentate Ligand for the Design of a New Class of Coordination Polymers Based on Silver(I) Salts – Influence of the Anion on Coordination Assemblies

Abstract

AbstractThe synthesis of a new family of coordination polymers [AgL2X]n (1a, X = CF3SO3; 1b, X = BF4; 1c, X = NO3; 1d, X = PF6) using 5‐methoxy‐1,3‐bis(pyridin‐3‐ylethynyl)benzene (L2) as the self‐assembling ligand is described. All compounds have been fully characterized by spectroscopic techniques and elemental analysis. In particular the X‐ray molecular structures of 1a and 1b are reported and confirm the formation of 1D silver(I) chains. Their arrangements are described as a function and the nature of the anion. The supramolecular product 1a exhibits argentophilic Ag···Ag interactions to afford infinite double chains. Additionally, η1–AgI–π interactions lead to the formation of a network of stacked layers of double chains. In contrast, 1b lacks metal–counterion bonding and is constituted of infinite coordination polymers, which are held together by π–π interactions. The pivotal role of the counteranions on the overall packing arrangement of the polymers is presented and discussed.