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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...
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.
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...
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...
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...
Properties of Transition Metals02:58

Properties of Transition Metals

Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.

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Updated: Jul 8, 2026

Fabrication of Spatially Confined Complex Oxides
08:45

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

N-oxides in metal-containing multicomponent molecular complexes.

Rupam Sarma1, Anirban Karmakar, Jubaraj B Baruah

  • 1Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.

Inorganic Chemistry
|January 5, 2008
PubMed
Summary
This summary is machine-generated.

Researchers synthesized rare cocrystals using 4-nitrobenzoic acid, N-oxides, and manganese/zinc aqua complexes. These cocrystals transform into metal complexes and coordination polymers, expanding materials science possibilities.

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Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

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Fabrication of Spatially Confined Complex Oxides
08:45

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Crystallography

Background:

  • Cocrystal synthesis offers a route to novel materials with tunable properties.
  • Metal-organic frameworks and coordination polymers are crucial in catalysis and gas storage.

Purpose of the Study:

  • To synthesize and characterize novel three-component cocrystals.
  • To investigate the transformation of these cocrystals into metal complexes and coordination polymers.
  • To explore the structural diversity achievable with rare cocrystal systems.

Main Methods:

  • Multi-component reaction synthesis.
  • Single-crystal X-ray diffraction for structural determination.
  • Thermogravimetric analysis and spectroscopic methods for characterization.

Main Results:

  • Successfully synthesized three-component cocrystals involving 4-nitrobenzoic acid, various aromatic N-oxides, and aqua complexes of manganese and zinc.
  • Demonstrated the structural transformation of these cocrystals into discrete metal complexes and extended coordination polymer networks.
  • Characterized the distinct crystal structures and coordination environments.

Conclusions:

  • The studied system provides a versatile platform for generating diverse metal-containing supramolecular architectures.
  • The findings highlight the potential of rare cocrystals as precursors for advanced functional materials.
  • This work contributes to the understanding of crystal engineering principles in the design of metal complexes and coordination polymers.