Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement01:21

[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement

3.7K
The Cope rearrangement is classified as a [3,3] sigmatropic shift in 1,5-dienes, leading to a more stable, isomeric 1,5-diene. The reaction involves a concerted movement of six electrons, four from two π bonds and two from a σ bond, via an energetically favorable chair-like transition state.
3.7K
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

2.9K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
2.9K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.7K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.7K
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds01:14

π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds

2.1K
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
2.1K
Frost Circles for Different Conjugated Systems01:18

Frost Circles for Different Conjugated Systems

4.4K
The inscribed polygon method is consistent with Hückel’s 4n + 2 rule and helps to learn whether the given cyclic compound is aromatic or not. The compound is stable and aromatic if every bonding molecular orbital (MO) is completely filled with a pair of electrons. However, if the non-bonding or antibonding orbitals are filled with electrons, the compound is unstable and not aromatic. Consider the Frost circle diagrams for cycloalkenes containing 4 to 8 carbons.
4.4K
Thermal Sigmatropic Reactions: Overview01:16

Thermal Sigmatropic Reactions: Overview

2.7K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
2.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Atmospheric Oxidation Kinetics of Monochloramine by Hydroxyl Radical, Carbonyl Oxide, and Sulfur Trioxide Catalyzed by Water.

The journal of physical chemistry. A·2026
Same author

Reinventing Density Functional Theory with Machine Learning on Integral Features.

Journal of chemical theory and computation·2026
Same author

Selective Syngas Production from Partial Oxidation of Methane with Molecular Oxygen Catalyzed by a Rh<sub>3</sub>O<sub>2</sub><sup>-</sup> Cluster.

The journal of physical chemistry letters·2026
Same author

Study on the Kinetic Characteristics of NO<sub>2</sub> with 2-Ethylfuran: N-Atom vs. O-Atom Attack.

The journal of physical chemistry. A·2026
Same author

Dissection of potential mechanism of Bao-Yuan tablet against Spleen-Qi Deficiency by UPLC-Q/TOF MS and network pharmacology.

Journal of pharmaceutical and biomedical analysis·2026
Same author

Effects of Pyridine Ligands on the Structure and Reactivity of Cu<sub>3</sub>O<sup>+</sup> Clusters toward CO<sub>2</sub>.

The journal of physical chemistry. A·2026

Related Experiment Video

Updated: Apr 16, 2026

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

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

Published on: November 9, 2019

8.5K

Room-Temperature Gas-Phase CO2-to-C3 Coupling by a 4f-Aromatic Cluster.

Feng-Xiang Zhang1, Xiao-Wang Li1, Ning-Zheng Li2

  • 1Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China.

Angewandte Chemie (International Ed. in English)
|April 15, 2026
PubMed
Summary

Researchers converted carbon dioxide (CO2) into multi-carbon products at room temperature using a novel Praseodymium-Boron-Carbon anion (PrB2C2-). This discovery offers a new pathway for C-C bond formation via CO2 utilization.

Keywords:
CO2 conversionPr─C bondaromaticitypraseodymiumrare‐earth

More Related Videos

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

3.5K
In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
11:38

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

17.2K

Related Experiment Videos

Last Updated: Apr 16, 2026

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

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

Published on: November 9, 2019

8.5K
Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

3.5K
In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
11:38

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

17.2K

Area of Science:

  • Inorganic Chemistry
  • Organometallic Chemistry
  • Catalysis

Background:

  • Converting carbon dioxide (CO2) into valuable multi-carbon products (C3 or C3+) at room temperature is challenging due to low selectivity and limited carbon-carbon (C-C) coupling.
  • Developing efficient catalysts for CO2 activation and C-C bond formation is crucial for sustainable chemistry.

Purpose of the Study:

  • To identify novel catalysts for room-temperature CO2 conversion into multi-carbon products.
  • To elucidate the mechanism of C-C coupling in CO2 activation mediated by f-block elements.

Main Methods:

  • Mass spectrometry
  • Photoelectron imaging spectroscopy
  • Density functional calculations

Main Results:

  • Identification of the 4f-metalla-aromatic anion PrB2C2- exhibiting double aromaticity.
  • Demonstration of room-temperature reaction between PrB2C2- and CO2 to form C3B2O2- with a C-C-C backbone.
  • Elucidation of a three-stage C3-chain formation mechanism involving C-C coupling, flexible Pr-X bonding, and electron shuttling.

Conclusions:

  • The unique structure of PrB2C2- selectively activates CO2 towards C-C-C coupling, avoiding CO release.
  • This study provides insights into f-block-mediated small-molecule activation and a new route for synthesizing C-C bonded products from CO2.