Ag(I) Complexes Containing FlexibleN,N′-Di(3-pyridyl)adipoamide Ligands: Syntheses, Structures, Ligand Conformations, and Crystal-to-Crystal Transformations

Abstract

The reactions of N,N′-di(3-pyridyl)adipoamide (L) with the corresponding silver(I) salts afforded the complexes {[Ag(L)](PF6)·2CH3CN}∞, 1, {[Ag(L)](BF4)·CH3CN}∞, 2, {[Ag(L)](NO3)·CH3CN}∞, 3, {[Ag(L)](PF6)·4DMF}∞, 4, {[Ag(L)](BF4)·4DMF}∞, 5, {[Ag(L)](CF3SO3)·DMF}∞, 6, {[Ag(L)](ClO4)·CH3CN}∞, 7, {[Ag(L)](ClO4)}∞,8, [Ag2(L)2](p-TsO)2·2CH3CN (p-TsO = p-toluenesulfonate), 9, and [Ag(L)(p-TsO)]∞, 10. Complex 1 forms a one-dimensional (1D) concavo-convex chain, and complexes 2, 3, 6, and 7 show 1D polymeric pairs of zigzag chains supported by the Ag---Ag and π–π interactions, whereas complexes 4, 5, and 8 adopt zigzag chains. Complex 9 forms a zero-dimensional (0D) dinuclear metallocycle, and complex 10 shows a two-dimensional (2D) pleated grid with a {4,82} topology, respectively. The L ligands in these complexes adopt various ligand conformations, which are subjected to the changes of the counteranions and solvents, resulting in the different structural types. Reversible crystal-to-crystal transformation was o...