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Related Concept Videos

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...
What is Organic Chemistry?02:17

What is Organic Chemistry?

Organic chemistry is the study of compounds of carbon called organic compounds. Organic compounds either originate from living organisms or are synthesized by chemists. A defining trait of these compounds is the presence of carbon as the principal element, which is bonded to other carbon atoms and other elements such as hydrogen, oxygen, nitrogen, and sulfur. The existence of a wide array of organic molecules is a consequence of carbon atoms’ ability to form up to four strong bonds to other...
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
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.
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
Metabolism of Chemolithotrophs01:15

Metabolism of Chemolithotrophs

Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation. However, because inorganic electron donors...

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Related Experiment Video

Updated: Jul 5, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Theoretical organometallic chemistry.

R Hoffmann

    Science (New York, N.Y.)
    |March 6, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Organometallic chemists are developing new ways to understand metal-ligand complexes. By conceptually breaking down molecules into metal fragments and ligands, researchers can better predict their structure and reactivity.

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    Area of Science:

    • Organometallic Chemistry
    • Coordination Chemistry
    • Computational Chemistry

    Background:

    • Organometallic chemistry involves transition metals bonded to organic or inorganic ligands.
    • Understanding the electronic structure and reactivity of these complexes is crucial.
    • Novel structural types of metal-ligand complexes are continually being synthesized.

    Purpose of the Study:

    • To provide an approach for understanding the electronic structure, geometrical preferences, and reactivity of organometallic complexes.
    • To utilize a fragment-based analysis for predicting complex behavior.
    • To leverage available molecular orbital libraries for fragment analysis.

    Main Methods:

    • Conceptual decomposition of organometallic complexes into metal fragments (ML(n)) and ligands.
    • Utilizing a library of molecular orbitals for these fragments.
    • Reconstructing the complex by analyzing the interaction between ligand and metal fragment orbitals.

    Main Results:

    • A systematic approach to understanding complex electronic structures is presented.
    • The method allows for prediction of geometrical preferences and reactivity.
    • The fragment orbital interaction model provides insights into bonding.

    Conclusions:

    • The fragment-based conceptualization offers a powerful tool for organometallic chemists.
    • This approach aids in the rational design and understanding of new complexes.
    • Further development of molecular orbital libraries will enhance predictive capabilities.