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Properties of Organometallic Compounds

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.

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...

Reduction of Alkenes: Catalytic Hydrogenation

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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...

Metal-Ligand Bonds

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.
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Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.

Thermal and Photochemical Electrocyclic Reactions: Overview

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.

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Updated: Jun 5, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

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Published on: April 10, 2018

Ferrocene-Functionalized Atomically Precise Metal Clusters Exhibit Synergistically Enhanced Performance for CO₂

Guocheng Deng^1,2, Hyewon Yun^1,3, Yuping Chen⁴

¹Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea.

Angewandte Chemie (International Ed. in English)

|December 4, 2024

Summary

This summary is machine-generated.

We developed a novel hybrid nanocatalyst (Ag9Cu6-Fc) for CO2 electroreduction. This catalyst achieves 100% CO selectivity and high current density, surpassing previous benchmarks.

Keywords:

CO2 electroreduction cluster synthesis clusters ferrocene model catalyst

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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

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Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

Area of Science:

Nanocatalysis
Organometallic Chemistry
Electrochemistry

Background:

Hybrid nanocatalysts combine organometallic compounds and metal nanoparticles for enhanced functionality.
Metal clusters offer unique catalytic properties but can be further improved through functionalization.

Purpose of the Study:

To synthesize and characterize a novel hybrid nanocatalyst integrating an atomically precise metal cluster (Ag9Cu6) with alkynylferrocene molecules (Fc).
To investigate the enhanced catalytic performance of the Ag9Cu6-Fc hybrid catalyst in CO2 electroreduction.
To elucidate the synergistic effects of ferrocene functionalization on the catalytic activity and selectivity.

Main Methods:

Synthesis of the atomically precise Ag9Cu6 metal cluster.
Integration of alkynylferrocene molecules with the Ag9Cu6 cluster to form the Ag9Cu6-Fc hybrid catalyst.
Electrocatalytic evaluation of CO2 reduction using the Ag9Cu6-Fc catalyst in a membrane electrode assembly cell.
Operando experimental and computational studies to understand the catalytic mechanism.

Main Results:

The Ag9Cu6-Fc hybrid catalyst demonstrated significantly enhanced activity and selectivity for CO2 electroreduction compared to the unfunctionalized Ag9Cu6 cluster.
Achieved a record-high CO Faradaic efficiency of 100% and an industrial-level CO partial current density of -680 mA/cm2.
Established a continuous electron transfer channel via an ethynyl bridge and a unique local chemical environment.

Conclusions:

Ferrocene functionalization synergistically improves the catalytic performance of metal clusters for CO2 electroreduction.
The developed Ag9Cu6-Fc hybrid nanocatalyst represents a significant advancement for energy conversion technologies.
This work highlights the potential of metallic-organometallic hybrid nanoparticles in catalysis.