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Related Concept Videos

Metallic Solids02:37

Metallic Solids

21.5K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
21.5K
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

2.2K
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.
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Valence Bond Theory02:42

Valence Bond Theory

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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...
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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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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...
25.7K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

32.0K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
32.0K
Coordination Number and Geometry02:57

Coordination Number and Geometry

19.9K
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.
19.9K

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Related Experiment Video

Updated: Apr 9, 2026

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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Half metal in two-dimensional hexagonal organometallic framework.

Hao Hu1, Zhengfei Wang, Feng Liu

  • 1Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China, hhu0914@mail.xjtu.edu.cn.

Nanoscale Research Letters
|June 20, 2015
PubMed
Summary
This summary is machine-generated.

Two-dimensional hexagonal organometallic frameworks (HOMFs) exhibit unique electronic properties. Vanadium, manganese, and iron-based HOMFs are promising ferromagnetic half metals for spintronics.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid State Chemistry

Background:

  • Two-dimensional (2D) hexagonal organometallic frameworks (HOMFs) are novel materials with exotic electronic properties.
  • Previous studies have indicated potential half-metallic and topological insulating states in these systems.

Purpose of the Study:

  • To systematically investigate the structural, electronic, and magnetic properties of 3d transition metal (TM)-based HOMFs.
  • To identify potential applications of these materials in spintronics.

Main Methods:

  • First-principles calculations were employed to study HOMFs composed of triphenyl-metal molecules and metal atom bridges.
  • The study covered the entire 3d transition metal series (Sc to Cu).

Main Results:

  • Two distinct structural types were identified: buckled for TMs with less half-filled 3d bands and twisted otherwise.
  • HOMFs exhibited ferromagnetic, antiferromagnetic, and nonmagnetic properties, dependent on the TM's electronic configuration.
  • Vanadium (V), manganese (Mn), and iron (Fe) based HOMFs were found to be ferromagnetic half metals with significant band gaps (>1.5 eV) in the insulating spin channel.

Conclusions:

  • The structural and electronic properties of 3d TM-based HOMFs are tunable based on the transition metal used.
  • Ferromagnetic half-metallic V, Mn, and Fe HOMFs show great potential for future spintronics applications due to their large band gaps.