A rare cationic building block that generates a new type of polyhedral network with “cross-linked” pto topology

Abstract

A rare 8-connected cationic building block, [Cu₂L₈(μ-MF₆)]²⁺ (L = pyridyl ligand, M = Si, Ti, Ge, Zr or Sn), enables the formation of a small cubicuboctahedral supramolecular building block, SBB, when complexed by 2,4,6-tris(4-pyridyl)pyridine. The coordination network resulting from fusing the square faces of the SBBs can be described as a pto topology in which half of the square faces are cross-linked by MF₆²⁻ moieties, and represents the first example of a new 3,5-c topology.