Anion-Directed Coordination Networks of a Flexible S-Pivot Ligand and Anion Exchange in the Solid State

Abstract

Using an S-pivot joint flexible ligand bis(4-cyanobenzyl)sulfide (bcbs), three silver(I) complexes [Ag(bcbs)ClO4]n (1), [Ag2(bcbs) (CF3CO2)2]n (2), and {[Ag3(bcbs)4](PF6)3·4CH2Cl2}n (3) have been isolated. Configurations (“V”-, “L”-, and “W”-shapes) of the bcbs ligand in 1–3 can be tuned as a result of changing the anions of the silver(I) salts, which ultimately form a series of infinite low to high dimensional frameworks with different structures. The perchlorato compound 1 shows a stairway type 1-D ribbon structure, in which the anion acts as a monodentate terminal ligand. The bcbs ligand in 1 shows a gauche–anti arrangement, adopting an L-shape configuration. The π–π stacking interaction between adjacent ribbons in 1 yields a pseudo-2-D structure with a herringbone pattern. Compound 2 is composed of silver(I)–bcbs helical channels, which are further interlinked via monodentate bridging CF3CO2– ions forming a 3-D multichannel framework with a dmd topology. Unlike 1, the bcbs ligand in 2 shows an anti–an...