Structural studies of silver(I) coordination polymers with aryl iodide derived ligands

This paper reports novel silver polymers, built with iodine--silver interac tions, with interesting structural motifs. Four silver(I) coordination poly mers of the aryl iodide derived ligands, triiodobenzoic acid (HLL), tris(4- iodophenyl)-amine (L-2), and 5,7-diiodo-8-hydroxyquinoline (HL3), have been synthesized and characterized by X-ray crystallography. Treatment of Ag(CH 3COO) with HL1 yielded [Ag(L-1)] (1), whose structural analysis revealed 2D layers of ladders connected through weak Ag ... I interaction. Reactions o f AgClO4 and L-2 in benzene and nitrobenzene afforded, respectively, two di fferent products, [Ag(L-2)(H2O)]ClO4. C6H6 (2) and [Ag(L-2)(ClO4)] (3). Whi le the structure of 2 could be described as a 2D layer of square and octago ns perpendicular to [100], complex 3 is formed by 2D layers of the same top ology of 2 (8(2). 4), alternating as ABAB. In contrast, complex 4, [Ag-2(H2 L3)(CK3SO3)(3)], obtained by reaction of Ag(CF3SO3) and HL3, was found to c onsist of a 2D layer based on columnar arrays AgH2L3-Ag(triflate). The soli d-state FT-IR and Ag-109 NMR- spectra of theses complexes are discussed on the basis of their crystal structures.