New silver(I) coordination architectures of pyridyl dithioether ligands with Ag⋯Ag, Ag⋯O, Ag⋯S and C–H⋯F weak interactions

Abstract

In our continuous efforts to investigate the coordination architectures of silver(I) complexes with thioethers, we report herein the syntheses and crystal structures of three new silver(I) complexes, a trinuclear complex [ Ag 3 L 2 2 ( NO 3 ) 2 ] ( NO 3 ) ( CH 3 CN ) 2 and two one-dimensional chain complexes [Ag 2 L 1 (BF 4) 2(CH 3CN) 2] ∞ 1 and [Ag 2 L 3 (NO 3) 2] ∞ 3, where L 1 , L 2 and L 3 are three structurally related pyridyl dithioether ligands: 1,4-bis(2-pyridylthio)butane ( L 1 ), 1,5-bis(2-pyridylthio)pentane ( L 2 ) and 1,6-bis(2-pyridylthio)hexane ( L 3 ). The structural differences of 1, 2 and 3 show the influences of the ligand spacers on the coordination modes of the terminal pyridylsulfanyl groups and the coordination geometries of the Ag I ion. There exist Ag⋯Ag contacts in the three complexes, C–H⋯F weak hydrogen bonds in 1, Ag⋯S weak coordination bonds in 2 and Ag⋯O weak interactions in 2 and 3, and these weak interactions link the low-dimensional complexes into high-dimensional supramolecular structures and further stabilize the crystal structures in the solid states.