Bis{μ-3-[3-(2-pyridyl)pyrazol-1-ylmethyl]pyridine}disilver(I) bis(trifluoromethanesulfonate): effect of counter-anions on the self-assembly of coordination complexes

Abstract

As part of a study on the effect of different counter-anions on the self-assembly of coordination complexes, a new dinuclear Ag(I) complex, [Ag(2)(C(14)H(12)N(4))(2)](CF(3)SO(3))(2), with the 3-[3-(2-pyridyl)pyrazol-1-ylmethyl]pyridine (L) ligand was obtained through the reaction of L with AgCF(3)SO(3). In this complex, each Ag(I) center in the centrosymmetric dinuclear complex cation is coordinated by two pyridine and one pyrazole N-atom donor of two inversion-related L ligands in a trigonal planar geometry. This forms a unique box-like cyclic dimer with an intramolecular nonbonding Ag...Ag separation of 6.379 (7) A. Weak Ag...CF(3)SO(3) and C-H...X (X = O and F) hydrogen-bonding interactions, together with pi-pi stacking interactions, link the complex cations along the [001] and [1\overline{1}0] directions, respectively, generating two different one-dimensional chains and then an overall two-dimensional network of the complex running parallel to the (110) plane. Comparison of the structural differences with previous findings suggests that the presence of different counter-anions plays an important role in the construction of such supramolecular frameworks.