Synthesis and the crystal and molecular structure of the silver(I)–germanium(IV) polymeric complex with citrate anions {[Ag2Ge(HCit)2(H2O)2] ∙ 2H2O}n

Abstract

The synthesis and X-ray diffraction study of compound {[Ag₂Ge(НCit)₂(H₂O)₂] ∙ 2H₂O}_n, where H₄Cit is the citric acid, are performed. In the polymeric structure, the НCit^3– ligand fulfils the tetradentate chelate–μ₄-bridging (3Ag, Ge) function (tridentate with respect to Ge and Ag atoms). The Ge atom is octahedrally coordinated by six O atoms of two HCit^3–ligands. The coordination polyhedron of the Ag atom is an irregular five-vertex polyhedron [four O atoms of four HCit^3– ligands and the О(Н₂О) atom]. An extended system of О–Н···О hydrogen bonds connects complex molecules into a supramolecular 3D-framework.