Di-μ-nitrato-κ4O:O′-bis[bis(3-hydroxypyridine-κN)silver(I)] dihydrate

The dinuclear title complex, [Ag2(NO3)2(3-PyOH)4]·2H2O (3-PyOH is 3-hydroxy­pyridine, C5H5NO), situated across a crystallographic inversion centre, can be described as a dimeric structure, in which two [Ag(3-PyOH)2] groups are held together by the Ag⋯Ag inter­action [3.317 (1) A]. Each Ag atom is two-coordinate and exists in an approximately linear geometry. The two NO3− ions inter­act with the AgI atoms in a bridging mode through very weak Ag⋯O inter­actions [Ag⋯O = 2.862 (2) and 2.877 (2) A]. A three-dimensional supramolecular framework is formed by O—H⋯O hydrogen bonds.