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Related Concept Videos

Bonding in Metals02:32

Bonding in Metals

52.1K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
52.1K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

24.0K
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...
24.0K
Properties of Transition Metals02:58

Properties of Transition Metals

29.6K
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.
29.6K
Phase Transitions02:31

Phase Transitions

22.7K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
22.7K
Bond Energies and Bond Lengths02:49

Bond Energies and Bond Lengths

31.2K
Stable molecules exist because covalent bonds hold the atoms together. The strength of a covalent bond is measured by the energy required to break it, that is, the energy necessary to separate the bonded atoms. Separating any pair of bonded atoms requires energy — the stronger a bond, the greater the energy required to break it.
31.2K
Valence Bond Theory02:42

Valence Bond Theory

11.2K
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...
11.2K

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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
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Multiple Bonds in Uranium-Transition Metal Complexes.

Prachi Sharma, Dale R Pahls, Bianca L Ramirez

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    |July 23, 2019
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    Summary
    This summary is machine-generated.

    Computational studies reveal novel uranium heterobimetallic complexes with transition metals. A 5-fold uranium-manganese bond is predicted, offering new insights into bonding in actinide chemistry.

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    Area of Science:

    • Inorganic Chemistry
    • Computational Chemistry
    • Actinide Chemistry

    Background:

    • Uranium's coordination chemistry is complex and not fully understood.
    • Exploring heterobimetallic complexes can reveal novel bonding interactions.
    • First-row transition metals offer diverse electronic properties for complex formation.

    Purpose of the Study:

    • To computationally predict and analyze novel heterobimetallic complexes containing uranium.
    • To investigate the nature of metal-metal bonding between uranium and first-row transition metals.
    • To explore the potential for multiple bonding in these systems.

    Main Methods:

    • Density Functional Theory (DFT) calculations.
    • Multireference wave function based methods.
    • Analysis of synthetically inspired uranium-based metalloligands.

    Main Results:

    • Predicted multiple bonding between uranium and chromium, manganese, and iron.
    • Unprecedented 5-fold bonding predicted between uranium and manganese in UMn(iPr2PCH2NPh)3.
    • Electronic structure analysis supports the presence of these multiple bonds.

    Conclusions:

    • Novel uranium heterobimetallic complexes can be computationally designed.
    • Multiple bonding, including a unique U-Mn quintuple bond, is feasible.
    • These findings expand the understanding of bonding in uranium chemistry.