Supra­molecular framework in catena-poly[[(nitrato-κO)silver(I)]-μ-(R,S)-2-(pyridin-4-ylsulfin­yl)pyrimidine-κ³N,O:N′]

In the title complex, [Ag(NO₃)(C₉H₇N₃OS)]_n, η¹:η¹:η¹:μ₂-bridging 2-(pyridin-4-ylsulfin­yl)pyrimidine (pypmSO) ligands with opposite chiralities are alternately arranged to link the Ag^I cations through two N atoms and one sulfinyl O atom of each ligand, leading to an extended zigzag coordination chain structure along the [01] direction. An FT–IR spectroscopic study shows a decreased stretching frequency for the η¹-O-bonded S=O group compared with that of the free ligand. The parallel chains are arranged and inter­connected via O(S=O)...π(pyridine/pyrimidine) and C—H(pyridine)...O(NO₃⁻) inter­actions to furnish a layer almost parallel to the ac plane. Along the b axis, the layers are stacked and stabilized through anion(NO₃⁻)...π(pyrimidine) inter­actions to form a three-dimensional supra­molecular framework. The ligand behaviour of the new diheterocyclic sulfoxide and the unconventional O(S=O)...π(pyridine/pyrimidine) and anion(NO₃⁻)...π(pyrimidine) inter­actions in the supra­molecular assembly of the title complex are presented.