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Related Concept Videos

Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Coordination Number and Geometry02:57

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

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Related Experiment Video

Updated: Jul 2, 2026

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
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Published on: December 29, 2016

Chalcogenide centred gold complexes.

M Concepción Gimeno1, Antonio Laguna

  • 1Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain.

Chemical Society Reviews
|September 3, 2008
PubMed
Summary
This summary is machine-generated.

Chalcogenide-centred gold complexes exhibit unique geometries and properties like luminescence. Aurophilic interactions are key to their stability and characteristics, enabling diverse synthetic applications in organometallic chemistry.

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Area of Science:

  • Inorganic Chemistry
  • Organometallic Chemistry
  • Materials Science

Background:

  • Chalcogenide-centred gold complexes feature a central chalcogen atom bonded to multiple gold atoms.
  • These complexes display unique properties including unusual geometries, electron deficiency, luminescence, and non-linear optical characteristics.
  • The trinuclear [E(AuPR3)3]+ 'oxonium' type species are particularly well-known for their synthetic versatility.

Purpose of the Study:

  • To review the field of chalcogenide-centred gold complexes.
  • To highlight their structural features, properties, and synthetic importance.
  • To emphasize the role of aurophilic interactions in their behavior.

Main Methods:

  • Literature review of 117 references.
  • Analysis of structural, electronic, and photophysical properties.
  • Discussion of synthetic pathways and applications.

Main Results:

  • Chalcogenide-centred gold complexes exhibit diverse geometries and electron-deficient nature.
  • Luminescence and non-linear optical properties are significant characteristics.
  • Aurophilic interactions are crucial for stability, geometry selection, and luminescence.

Conclusions:

  • Chalcogenide-centred gold complexes are a versatile class of compounds with significant potential in various chemical applications.
  • Their unique properties are intrinsically linked to the presence of gold atoms and aurophilic interactions.
  • These complexes serve as valuable building blocks for more complex organometallic structures.