Supramolecular structure of a cadmium-silver complex forming a two-dimensional network embracing one-dimensional chains in a layered crystal structure

The polymeric coordination compound, poly[trans-bis (4-aminopyridine)cadmium(II)-bis[mu-dicyanoargentato(I)- N:N']]-catena-poly[(2-aminoethanol-N,O)-(4-aminopyridine) [dicyanoargentato(I)-N] cadmium(II)-mu-[dicyanoargentato(I)-N:N']] (1/2), {[Cd(4-ampy)(2)-{mu-Ag(CN)(2)}(2)].[Cd(mea)(4-ampy) {Ag(CN)(2)} {mu-Ag(CN)(2)}](2)}(n) (4-ampy=4-aminopyridine, C5H6N2; mea=2-aminoethanol, C2H7NO) has a supramolecular structure composed of a two-dimensional network of Cd-NCAgCN-Cd spans, where each Cd is ligated by two 4-ampy ligands in trans positions, embracing one-dimensional chains of (-Cd-NCAgCN-)(n). In these chains each Cd is monodentately ligated by an -NCAgCN 'branch' and a 4-ampy ligand, and bidentately chelated by mea. The network is stacked along the b axis to give a layered crystal structure, in which each monodentate -NCAgCN branch protruding from the chain penetrates through the mesh to form a hydrogen bond with the OH group of the mea ligand in the crystallographically equivalent chain in the adjacent layer.