Abstract
The combination of transition metal fragments with 90 or 180° angles, viz. cis-a 2M II (a=amine or a 2=diamine; M=Pt or Pd) and trans-a 2Pt II or Hg II, respectively, with (heterocyclic ligands providing 90, 120, or 180° angles leads, either in a self-assembly process or in a stepwise fashion, to cations of versatile shapes and charges. Examples include open boxes, molecular squares, hexagons, triangles and cups. Intermolecular H bonding can assist association of smaller entities. Synthetic and structural aspects as well as physico–chemical properties of selected examples with be discussed.
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