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Related Concept Videos

Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
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...
Types of Chemical Bonds02:37

Types of Chemical Bonds

Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O.
Types of Chemical Bonds02:37

Types of Chemical Bonds

Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O.
Ionic Bonds00:42

Ionic Bonds

When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.Opposing Charges Hold Ions Together in Ionic CompoundsIonic bonds are reversible electrostatic interactions between ions with...

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Related Experiment Video

Updated: Jul 10, 2026

Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys
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Stable magnesium(I) compounds with Mg-Mg bonds.

Shaun P Green1, Cameron Jones, Andreas Stasch

  • 1School of Chemistry, Monash University, Post Office Box 23, Victoria 3800, Australia.

Science (New York, N.Y.)
|November 10, 2007
PubMed
Summary

Researchers synthesized novel magnesium(I) compounds by reducing magnesium(II) iodide complexes. These stable compounds feature a unique magnesium-magnesium single bond, challenging traditional group 2 metal chemistry.

Area of Science:

  • Inorganic Chemistry
  • Organometallic Chemistry
  • Materials Science

Background:

  • Group 2 metals typically exhibit a +2 oxidation state.
  • The synthesis and characterization of lower oxidation states in these metals are rare and scientifically significant.
  • Magnesium chemistry is predominantly understood through its common +2 oxidation state.

Purpose of the Study:

  • To explore the reduction of magnesium(II) iodide complexes.
  • To synthesize and characterize novel, thermally stable magnesium(I) compounds.
  • To investigate the nature of bonding in these low-valent magnesium species.

Main Methods:

  • Reduction of magnesium(II) iodide complexes using potassium metal in toluene.
  • Isolation and purification of the resulting magnesium(I) compounds.

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  • X-ray crystallography and theoretical studies for structural and bonding analysis.

    • Main Results:

    • Successful synthesis of two thermally stable magnesium(I) compounds, (L)MgMg(L).
    • X-ray crystallography confirmed single, covalent magnesium-magnesium bonds with lengths around 2.85 Å.
    • Theoretical studies support the presence of a Mg-Mg single bond and predominantly ionic interactions with ligands.

    Conclusions:

    • Demonstrated the feasibility of accessing magnesium(I) compounds through reductive methods.
    • Provided experimental and theoretical evidence for a covalent Mg-Mg single bond.
    • Expanded the understanding of oxidation states and bonding in group 2 metal chemistry.