Preparation and Crystal Structure of Silver(I) Anthranilate

Abstract

Silver(I) anthranilate, [Ag₂(C₇H₆NO₂)₂]_n, was isolated as the major constituent in the attempted preparation of the adduct of anthranilic acid (2-aminobenzoic acid) with silver(I) p-toluenesulfonate and its structure has been determined by using single-crystal X-ray diffraction. Crystals of the complex are monoclinic, space group P 2₁/n, with two dimers in a cell of dimensions a 5·3516(8), b 4·9746(2), c 25·386(5) Å, β 91· 547(8)°. The complex repeating unit comprises a distorted centrosymmetric biscarboxylato(-O,O′)-bridged dimer [Ag−O, 2·223, 2·409(4) Å; Ag---Ag 2·9128(9) Å] but has, in addition, a third bond to an adjacent amine nitrogen [Ag−N, 2·301(5) Å], which extends the structure into a zigzag chain polymer. The stereochemistry about each Ag centre is distorted trigonal planar [angle range, 89·9−142·9(2)°]. Relatively short inter-dimer Ag---Ag separations [2·989(1) Å] are also present.