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

Abstract

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—CH2bond. The AgIatom has a distorted trigonal–planar P2O coordination environment. The packing is characterized by intermolecularT-shaped π–π interactions between the phenyl rings of the PPh3substituents 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 AgIion.