| 18578491 |
Teo P, Koh LL, Hor TS: Oligo- and polymeric Pd (II) and Pt (II) using pyridyl carboxylate spacers for topology control. Inorg Chem. 2008 Jul 21;47(14):6464-74. Epub 2008 Jun 26.
An array of Pd (II) and Pt (II) supramolecular assemblies have been constructed using pyridyl carboxylates as spacers and phosphines [(C5H4PPh2) 2Fe (dppf) and PPh3)] as supporting ligands. Different molecular topologies such as squares, triangles, rectangles, and polymers can be controlled by the spatial and directional character of the spacer. A change of the denticity of the phosphine does not affect the topological outcome. Significant differences, however, are observed for the congeneric analogues, with Pd (II) showing a more pronounced tendency toward coordination polymer formation and its attached carboxyl a higher affinity toward Ag (+). The ability of these assemblies to capture cations, such as Na (+) in [Pt3Na (3-NC5H4CO2) 3 (OTf) 3 (PPh3) 6](+) through hydrogen bonding or Ag (+) in [PdAg (2-NC5H4CO2)(OTf) 2 (dppf)] through dative bonding, is described and compared. All of the complexes are structurally characterized by single-crystal X-ray crystallography. |
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