Counter-anion role in the formation of two supra­molecular complexes: [Ag₂(DPP)₂](ClO₄)₂·CH₃CN and [Ag₂(DPP)₂(NO₃)₂] {DPP is N-[(di­phenyl­phosphanyl)methyl]pyridin-4-amine}

In the Ag complex of N-[(di­phenyl­phosphanyl)methyl]pyridin-4-amine (DPP) with perchlorate, the unique Ag⁺ cation has a near-linear coordination geometry consisting of one pyridine N atom and one P atom from two different DPP ligands. In the analogous complex with nitrate, the nitrate anions weakly chelate to each Ag⁺ cation, leading to each Ag⁺ cation having a distorted tetra­hedral coordination geometry consisting of one pyridine N atom and one P atom from two different DPP ligands, and two chelating nitrate O atoms.