Crystal and molecular structure of bis(di-n-propylammonium) dioxalatodiphenylstannate, [n-Pr₂NH₂]₂[(C₂O₄)₂SnPh₂]

The title compound [n-Pr₂NH₂]₂[(C₂O₄)₂SnPh₂] (1) has been synthesized by allowing Ph₂SnCl₂ to react with [n-Pr₂NH₂]₂C₂O₄. In 1, characterized using X-ray crystallography, the Sn atom is six-coordinated by two phenyl groups and four oxygen atoms belonging to two asymmetrically chelating oxalate ligands. The geometry is cis octahedral about tin. In the structure of 1, there are two [(C₂O₄)₂SnPh₂]^2- moieties differentiated by their ∠C-Sn-C angles [105.07° (15°) and 107.43° (16°)]. These similar, but distinct, anions are connected by [n-Pr₂NH₂]⁺ cations through N-H···O hydrogen bonds leading to two infinite alternating chains (1) and (2), which loosely assemble via π-π stacking between phenyl groups of adjacent molecules to generate an overall layered structure.