Related Experiment Video
Updated: Jun 6, 2026

Preparation of a Corannulene-functionalized Hexahelicene by Copper(I)-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
A concentric planar doubly π-aromatic B₁₉⁻ cluster
Wei Huang1, Alina P Sergeeva, Hua-Jin Zhai
1Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
Boron clusters exhibit unique bonding. The B₁₉⁻ cluster displays double π-aromaticity, a novel bonding characteristic not observed in organic compounds, offering new avenues in materials science.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Quantum Chemistry
Background:
- Atomic clusters exhibit unique size-dependent properties.
- These clusters are crucial for discovering novel molecular structures and chemical bonding.
Purpose of the Study:
- Investigate the chemical bonding and structure of the B₁₉⁻ cluster.
- Explore its electronic properties and compare them to known aromatic systems.
Main Methods:
- Photoelectron spectroscopy was used to analyze the electronic structure of B₁₉⁻.
- Theoretical calculations determined the global minimum and bonding characteristics.
Main Results:
- The B₁₉⁻ cluster adopts a planar structure with a central B₆ pentagonal unit and an outer B₁₃ ring.
- It exhibits a unique double π-aromaticity with two distinct π-electron systems.
- A high electron-binding energy was observed in the photoelectron spectrum.
Conclusions:
- The B₁₉⁻ cluster showcases unprecedented double π-aromaticity, distinct from organic compounds.
- This finding highlights the unique chemical bonding capabilities of atomic clusters.
- The study opens new possibilities for designing novel materials with tailored electronic properties.
More Related Videos
06:35Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
08:46Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
Related Concept Videos
Radicals: Electronic Structure and Geometry
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
Structure of Benzene: Molecular Orbital Model
Five-Membered Heterocyclic Aromatic Compounds: Overview
π Molecular Orbitals of 1,3-Butadiene
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group with both...
Frost Circles for Different Conjugated Systems