Related Experiment Video
Updated: Jan 17, 2026
10:51
The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
12.7K
A Heterodimetallic Monomeric Complex with a Uranium-Cobalt Triple Bond
Kang Liu1, Yan Guo1,2, Jing Zhao3
1Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
Angewandte Chemie (International Ed. in English)
|September 15, 2025
Summary
Researchers synthesized a novel heterodimetallic complex with a uranium-cobalt triple bond, showcasing its unique structure and catalytic activity in alkyne transformations.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Materials Science
Background:
- Heterodimetallic complexes with multiple metal-ligand bonds are rare.
- Uranium-metal triple bonds are particularly underexplored in coordination chemistry.
Purpose of the Study:
- To synthesize and characterize a novel heterodimetallic monomeric complex featuring a U-Co triple bond.
- To investigate the structural, electronic, and magnetic properties of the synthesized complex.
- To explore the catalytic potential of the complex in organic transformations.
Main Methods:
- Synthesis of [(TrapenCH2PPh2)U(Co)] (4) via reaction of uranium precursors with CoCl2 and KC8.
- X-ray crystallography to determine the crystal structure and U-Co bond length.
- Computational investigations (e.g., DFT) to analyze bonding and electronic structure.
- Magnetic susceptibility measurements to determine magnetic moments.
Main Results:
- Successful synthesis and structural characterization of the heterodimetallic complex [(TrapenCH2PPh2)U(Co)] (4).
- Confirmation of a U-Co triple bond with a bond length of 2.1890(11) Å.
- Observation of significant U-Namine bond contraction, indicative of electronic reinforcement via inverse trans-influence.
- Computational studies supporting U≡Co triple bond and U(IV)/Co(-I) formal oxidation states.
- Low-temperature magnetic moments approaching 2.1 μB, attributed to spin-orbit coupling.
Conclusions:
- The study presents a rare example of a heterodimetallic complex with a U-Co triple bond.
- The inverse trans-influence plays a crucial role in stabilizing the complex.
- The complex exhibits catalytic activity in hydroboration and dimerization of terminal alkynes under mild conditions.
More Related Videos
12:05U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen
Published on: February 21, 2019
8.4K
06:31Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase
Published on: March 19, 2020
7.6K
Related Concept Videos
02:42Valence 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
03:02Colors and Magnetism
14.0K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.0K
02:51Metal-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...
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
01:19Complexation Equilibria: The Chelate Effect
1.2K
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...
1.2K
02:34Structural Isomerism
21.5K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
21.5K
00:43Complexometric Titration: Ligands
2.2K
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
2.2K