monodentate

(adjective)

Describing a ligand that has only a single bond with the central atom.

Related Terms

  • donor atom
  • polydentate
  • pseudohalides
  • polyatomic
  • coordination compound

Examples of monodentate in the following topics:

  • Chelating Agents

    • Chelate complexes are contrasted with coordination complexes composed of monodentate ligands, which form only one bond with the central atom.
    • The chelate effect describes the enhanced affinity of chelating ligands for a metal ion compared to the affinity of a collection of similar nonchelating (monodentate) ligands for the same metal.
    • In (2), the two monodentate methylamine ligands of approximately the same donor power (the enthalpy of formation of Cu—N bonds is approximately the same in the two reactions) forms a complex.
    • The effect increases with the number of chelate rings, so the concentration of the EDTA complex, which has six chelate rings, is much higher than a corresponding complex with two monodentate nitrogen donor ligands and four monodentate carboxylate ligands.
  • Coordination Number, Ligands, and Geometries

    • Monodentate ligands include virtually all anions and all simple Lewis bases.
  • Naming Coordination Compounds

    • Multiple occurring monodentate ligands receive a prefix according to the number of occurrences: di-, tri-, tetra-, penta-, or hexa.
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