Metal−Organic Polyhedron Based on a Cu^II Paddle-Wheel Secondary Building Unit at the Truncated Octahedron Corners

A metal−organic polyhedron of truncated octahedral geometry augmented with a C₄-symmetric square-planar Cu^II paddle-wheel node as a secondary building unit can be prepared using a C₃-symmetric ligand that occupies the face of the octahedral cage, where the three phenyl groups containing a m-carboxylate group in the ligand provide the necessary curvature to form the finite octahedral cage.