Crystal structure of a mixed-ligand silver(I) complex of the non-steroidal anti-inflammatory drug diclofenac and pyrimidine

Abstract

In the title mixed-ligand silver(I) coordination polymeric complex with the nonsteroidal anti-inflammatory drug diclofenac (C14H11Cl2NO2) (diclH) and pyrimidine (pym), namely poly[{mu(2)-2-[2-(2,6-dichloroanilino) phenyl] acetato-kappa(2) O: O'}(mu(2)-pyrimidine-(kappa)2 N 1 : N 3) silver(I)], [Ag(C14H10Cl2NO2)(C4H4N2)](n) or [Ag(mu-dicl)(mu-pym)](n), the very distorted tetrahedral AgN2O2 coordination centres comprise two N-atom donors from bridging pym ligands [Ag-N = 2.381 (3) and 2.412 (3) angstrom] and two carboxylate O-atom donors from dicl ligands [Ag-O = 2.279 (2) and 2.280 (2) angstrom], which bridge Ag atoms, giving a centrosymmetric dinuclear units with a short Ag center dot center dot center dot Ag separation [2.8931 (5) angstrom]. Within the units are short intraligand C-Cl center dot center dot center dot pi (pym) interactions [3.6409 (15) angstrom]. The units are linked through the bridging N atoms of the pym ligand into a two-dimensional sheet-polymer structure lying parallel to (100) and stabilized by inter-ring pi-pi interactions between the pym ligands [Cg center dot center dot center dot Cg = 3.4199 (17) angstrom]. Additional inter-unit C-H center dot center dot center dot O and C-H center dot center dot center dot Cg hydrogen-bonding interactions between the sheets give an overall threedimensional structure.