Sorption and Magnetic Properties of Oxalato-Based Trimetallic Open Framework Stabilized by Charge-Assisted Hydrogen Bonds.

We report a new structure of {[Co(bpy)(ox)][{Cu(bpy)(ox)}Fe(ox)]}·8.5nHO presenting a rare ladder topology among oxalate-based coordination polymers with anionic chains composed of alternately arranged [Cu(bpy)(ox)] and [Fe(ox)] moieties. Along the a axis, they are separated by Co(III) units to give porous material with voids of 963.