Crystal structure of (μ-1,4-di­carb­­oxy­butane-1,4-di­carboxyl­ato)bis­­[bis­­(tri­phenyl­phosphane)silver(I)] di­chloro­methane tris­­olvate

The mol­ecular structure of the tetra­kis(tri­phenyl­phosphan­yl)disilver salt of butane-1,1,4,4-tetra­carb­oxy­lic acid, [Ag2(C8H8O8)(C18H15P)4]·3CH2Cl2, crystallizes with one and a half mol­ecules of di­chloro­methane in the asymmetric unit. The coordination complex exhibits an inversion centre through the central CH2—CH2 bond. The AgI atom has a distorted trigonal–planar P2O coordination environment. The packing is characterized by inter­molecular T-shaped π–π inter­actions between the phenyl rings of the PPh3 substituents in neighbouring mol­ecules, forming a ladder-type superstructure parallel to [010]. These ladders are arranged in layers parallel to (101). Intra­molecular hydrogen bonds between the OH group and one O atom of the Ag-bonded carboxyl­ate group results in an asymmetric bidendate coordination of the carboxyl­ate moiety to the AgI ion.