In the title complex, [Ag(NO3)(C6H7N3O)](n) or [Ag(NO3)( pyaoxH(2))] (pyaoxH(2) is N-hydroxypyridine-2-carboxamidine), the Ag ion is bridged by the pyaoxH(2) ligands and nitrate anions, giving rise to a two-dimensional molecular structure. Each pyaoxH(2) ligand coordinates to two Ag ions using its pyridyl and carboxamidine N atoms, and the OH and the NH2 groups are uncoordinated. Each nitrate anion uses two O atoms to coordinate to two Ag ions. The Ag center dot center dot center dot Ag separation via the pyaoxH(2) bridge is 2.869 (1) angstrom, markedly shorter than that of 6.452 (1) angstrom via the nitrate bridge. The two-dimensional structure is shscale-like, and can be described as pyaoxH(2)-bridged Ag-2 nodes that are further linked by nitrate anions. Hydrogen bonding between the amidine groups and the nitrate O atoms connects adjacent layers into a three-dimensional network.

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tsinghua university