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Properties of Organometallic Compounds

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.

Alkali Metals

Alkali Metals

Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals

Qualitative Analysis

Qualitative Analysis

For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...

Complexation Equilibria: Factors Influencing Stability of Complexes

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...

Metal-Ligand Bonds

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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Updated: Mar 24, 2026

Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys

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Published on: June 27, 2022

Multi-functional magnesium alloys containing interstitial oxygen atoms.

H Kang¹, H J Choi², S W Kang¹

¹Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong Seodaemun-gu, Seoul, 120-749, Korea.

Scientific Reports

|March 16, 2016

Summary

Scientists created novel magnesium-oxygen (Mg-O) alloys by dissolving oxygen into magnesium. These advanced Mg-O alloys exhibit enhanced mechanical properties and corrosion resistance, paving the way for new material designs.

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Published on: September 23, 2018

Area of Science:

Materials Science
Metallurgy
Nanotechnology

Background:

Traditional magnesium alloys have limitations in mechanical strength and functional properties.
Developing new alloy compositions is crucial for advancing engineering applications.

Purpose of the Study:

To develop a new class of magnesium alloys incorporating dissolved oxygen.
To investigate the structural, mechanical, and functional properties of these novel Mg-O alloys.

Main Methods:

Dissolving oxygen atoms into a magnesium lattice by decomposing titanium dioxide nanoparticles in a magnesium melt at 720°C.
Separating titanium from the magnesium melt post-solidification.
Analyzing the lattice structure, bonding characteristics, and mechanical performance of the resulting Mg-O alloys.

Main Results:

Successfully created Mg-O alloys with oxygen atoms at octahedral sites, expanding the magnesium lattice.
Mg-O-Al casting alloy demonstrated superior mechanical performance, corrosion resistance, and thermal conductivity.
Mg-O-Zn wrought alloy exhibited high elongation to failure (>50%) due to unique plastic deformation in sub-micrometer grains.

Conclusions:

The novel Mg-O alloys possess combined ionic and metallic bonding, leading to outstanding properties.
This metal/non-metal interstitial alloy approach represents a new paradigm in commercial alloy design.
The developed alloys offer significant improvements for various engineering applications.