Abstract
A series of the silver(I) complexes of the type {[Ag(L1)][X]}â [L1=4-(pyridin-2-yl)methyleneamino-1,2,4-triazole; X=PF6â, 1, BF4â, 2, ClO4â, 3, and NO3â, 4], {[Ag(L2)(CH3CN)][PF6]}n (L2=4-(pyridin-3-yl)methyleneamino-1,2,4-triazole), 5, and {[Ag(L2)][CF3CO2]}n, 6, have been prepared by reactions of various Ag(I) salts with L1 or L2 in CH3CN. All the complexes have been structurally characterized by X-ray crystallography confirming that complexes 1â4 are one-dimensional coordination polymeric chains, while complexes 5 and 6 are two-dimensional and three-dimensional coordination polymeric net and frameworks, respectively. All the L1 ligands in complexes 1â4 act as tridentate ligands to chelate and bridge Ag(I) ions. The anions PF6â, BF4â and ClO4â in complexes 1â3 are not coordinated to the Ag(I) atoms while the NO3â anions in complex 4 are coordinated to the metal centers through one of the three oxygen atoms. All the tridentate L2 ligands in complexes 5 and 6 bind soft acid Ag(I) ions through the triazole and pyridyl groups forming the two-dimensional and three-dimensional coordination polymeric net and frameworks, respectively, while the anions PF6â and CF3CO2â in complexes 5 and 6 are not coordinated to the Ag(I) atoms. The anions in complexes 1â6 play important roles in linking cationic chains or layers into 3-D supramolecular structures.
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