Directed supramolecular assembly of Cu(II)-based "paddlewheels" into infinite 1-D chains using structurally bifunctional ligands

Dalton Trans. 2006 Apr 7:(13):1627-35. doi: 10.1039/b513765a. Epub 2005 Dec 6.

Abstract

The construction of Cu(II)-containing supramolecular chains is achieved by combining suitable anionic ligands (for controlling the coordination geometry and for creating a neutral building block) with four new bifunctional ligands containing a metal-coordinating pyridyl site and a self-complementary hydrogen-bonding moiety. Seven crystal structures are presented and in each case, the copper(II) complex displays a "paddlewheel" arrangement, with four carboxylate ligands occupying the equatorial sites, leaving room for the bifunctional ligand to coordinate in the axial positions. The supramolecular chemistry, which organizes the coordination-complexes into the desired infinite 1-D chains, is driven by a combination of N-H...N and N-H...O hydrogen-bonds in five of the seven structures.

MeSH terms

  • Carboxylic Acids / chemistry*
  • Copper / chemistry*
  • Crystallography, X-Ray
  • Hydrogen Bonding
  • Ligands
  • Macromolecular Substances / chemical synthesis
  • Macromolecular Substances / chemistry*
  • Models, Molecular
  • Molecular Structure
  • Organometallic Compounds / chemical synthesis
  • Organometallic Compounds / chemistry*

Substances

  • Carboxylic Acids
  • Ligands
  • Macromolecular Substances
  • Organometallic Compounds
  • Copper