A novel one-dimensional silver cylinder stabilized by mixed 2-mercaptobenzoic acid and ethylenediamine ligands

A novel infinite one-dimensional silver cylinder, namely poly[μ-ethylenediamine-μ(5)-(2-sulfanidylbenzoato)-μ(4)-(2-sulfanidylbenzoato)-tetrasilver(I)], [Ag(4)(C(7)H(4)O(2)S)(2)(C(2)H(8)N(2))](n), has been synthesized by one-pot reaction of equivalent molar silver nitrate and 2-mercaptobenzoic acid (H(2)mba) in the presence of ethylenediamine (eda). One Ag atom is located in an AgS(2)NO four-coordinated tetrahedral geometry, two other Ag atoms are in an AgS(2)O three-coordinated T-shaped geometry and the fourth Ag atom is in an AgSNO coordination environment. The two mba ligands show two different binding modes. The μ(2)-N:N'-eda ligand, acting as a bridge, combines with mba ligands to extend the Ag(I) ions into a one-dimensional silver cylinder incorporating abundant Ag···Ag interactions ranging from 2.9298 (11) to 3.2165 (13) Å. Interchain N-H···O hydrogen bonds extend the one-dimensional cylinder into an undulating two-dimensional sheet, which is further packed into a three-dimensional supramolecular framework by van der Waals interactions; no π-π interactions were observed in the crystal structure.