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Related Concept Videos

Structural Isomerism02:34

Structural Isomerism

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 be...
Valence Bond Theory02:42

Valence Bond Theory

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...
Valence Bond Theory02:45

Valence Bond Theory

Overview of Valence Bond Theory
Resonance02:52

Resonance

The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
Nuclear Stability03:18

Nuclear Stability

Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together in the...
Nuclear Transmutation03:20

Nuclear Transmutation

Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed protons being...

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Related Experiment Video

Updated: Jun 15, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
10:51

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

Published on: April 10, 2015

Uranium-nitrogen multiple bonding: isostructural anionic, neutral, and cationic uranium nitride complexes featuring a

Alexander R Fox1, Polly L Arnold, Christopher C Cummins

  • 1Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Room 6-435, Cambridge, Massachusetts 02139, USA.

Journal of the American Chemical Society
|February 25, 2010
PubMed
Summary

New uranium complexes with a linear U=N=U core were synthesized. This stable core was observed across multiple oxidation states, showing its versatility in uranium chemistry.

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U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen
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U2O5 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

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Last Updated: Jun 15, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
10:51

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

Published on: April 10, 2015

U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen
12:05

U2O5 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

Area of Science:

  • Organometallic Chemistry
  • Inorganic Chemistry
  • Uranium Chemistry

Background:

  • Uranium complexes are of interest due to their unique electronic properties and potential applications.
  • The synthesis and characterization of novel uranium nitride complexes can provide insights into bonding and reactivity.
  • Understanding the stability of uranium-nitrogen bonds is crucial for developing new uranium-based materials.

Purpose of the Study:

  • To synthesize and characterize novel bimetallic diuranium nitride complexes.
  • To investigate the stability of the linear U=N=U core across different oxidation states.
  • To explore the reactivity of these uranium nitride complexes.

Main Methods:

  • Synthesis of uranium(III) tris(anilide) complexes.
  • Reaction with azide salts to form bimetallic diuranium nitride complexes.
  • Characterization using NMR spectroscopy, single-crystal X-ray diffraction, and elemental analysis.
  • Electrochemical studies using cyclic voltammetry.

Main Results:

  • Formation of bimetallic diuranium(IV/IV) complexes with a linear, symmetric bridging nitride ligand.
  • Stepwise chemical oxidation to diuranium(IV/V) and diuranium(V/V) complexes, demonstrating the stability of the U=N=U core.
  • X-ray crystal structures revealed a contracted U=N=U core across the redox series, attributed to electrostatic effects.
  • Cyclic voltammetry showed reversible one-electron redox events.
  • The diuranium(V/V) complex reacted to form a known diuranium(IV/IV) cyanoimide complex, indicating metallonitrene character.

Conclusions:

  • The U=N=U core is stable across multiple uranium oxidation states (IV/IV, IV/V, V/V).
  • The observed contraction of the U=N=U bond is primarily electrostatic.
  • The U=N=U core exhibits metallonitrene-like reactivity.