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

Halogens03:01

Halogens

23.4K
Group 17 elements, known as halogens, are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine a solid. Astatine is a highly unstable radioactive element, so currently, most of its properties are unknown due to its short half-life. Tennessine is a synthetic element also predicted to be in this group. 
23.4K
Bonding in Metals02:32

Bonding in Metals

52.2K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
52.2K
Ionic Bonds00:42

Ionic Bonds

129.6K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
129.6K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

48.9K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
48.9K
Types of Chemical Bonds02:37

Types of Chemical Bonds

93.9K
Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O. 
93.9K
Bond Energies and Bond Lengths02:49

Bond Energies and Bond Lengths

31.3K
Stable molecules exist because covalent bonds hold the atoms together. The strength of a covalent bond is measured by the energy required to break it, that is, the energy necessary to separate the bonded atoms. Separating any pair of bonded atoms requires energy — the stronger a bond, the greater the energy required to break it.
31.3K

You might also read

Related Articles

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

Sort by
Same author

Nonconserving locally disordered exclusion process under constrained resources.

Physical review. E·2026
Same author

Immunophenotypic aberrancies in molecularly confirmed acute promyelocytic leukemia: lessons from two cases.

Journal of hematopathology·2026
Same author

Probing Weak Halogen Bonding in Aqueous Solution.

Journal of the American Chemical Society·2026
Same author

One-Pot Amidation/C─H Halogenation by an Efficient Electrochemical Cascade.

Angewandte Chemie (International ed. in English)·2026
Same author

Dynamic N→B coordination and anion-selective turn-on fluorescence in oxadiazole-functionalized organoboranes.

Organic & biomolecular chemistry·2026
Same author

Precursors for cell-state transitions: Stability, resilience, and predictability in Notch signaling pathways.

Chaos (Woodbury, N.Y.)·2026

Related Experiment Video

Updated: Jan 25, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

69.6K

Halogen Bonding Helicates Encompassing Iodonium Cations.

Alan Vanderkooy1, Arvind Kumar Gupta2, Tamás Földes3,4

  • 1Department of Chemistry-BMC, Uppsala Universitet, Husargatan 3, 752 37, Uppsala, Sweden.

Angewandte Chemie (International Ed. in English)
|May 11, 2019
PubMed
Summary
This summary is machine-generated.

Researchers created novel halonium-ion-based helices using specific backbones. These structures stabilize reactive iodonium ions through halogen bonding, enabling new synthetic applications like iodocyclization reactions.

Keywords:
3c-4e bondshalocyclizationhalogen bondshelicesiodonium ions

More Related Videos

In Vitro Method to Control Concentrations of Halogenated Gases in Cultured Alveolar Epithelial Cells
04:56

In Vitro Method to Control Concentrations of Halogenated Gases in Cultured Alveolar Epithelial Cells

Published on: October 23, 2018

7.0K
Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes
12:24

Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes

Published on: June 3, 2014

12.7K

Related Experiment Videos

Last Updated: Jan 25, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

69.6K
In Vitro Method to Control Concentrations of Halogenated Gases in Cultured Alveolar Epithelial Cells
04:56

In Vitro Method to Control Concentrations of Halogenated Gases in Cultured Alveolar Epithelial Cells

Published on: October 23, 2018

7.0K
Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes
12:24

Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes

Published on: June 3, 2014

12.7K

Area of Science:

  • Supramolecular Chemistry
  • Organic Synthesis
  • Halogen Bonding

Background:

  • Designing novel supramolecular structures is crucial for advancing chemical synthesis.
  • Halonium ions, particularly iodonium ions, are reactive species with potential in organic transformations.
  • Stabilizing reactive intermediates within defined architectures remains a synthetic challenge.

Purpose of the Study:

  • To design and synthesize the first halonium-ion-based helices.
  • To investigate the role of halogen bonding in stabilizing iodonium ions within helical structures.
  • To explore the synthetic utility of these novel helical complexes.

Main Methods:

  • Synthesis of oligo-aryl/pyridylene-ethynylene backbones.
  • Incorporation and stabilization of iodonium ions within helical structures.
  • Characterization using X-ray crystallography, NMR spectroscopy, and Density Functional Theory (DFT) calculations.

Main Results:

  • Successful design and synthesis of the first halonium-ion-based helices.
  • Halogen bonding interactions were confirmed to stabilize iodonium ions.
  • A unique close proximity of iodonium ions within the helix was observed, shorter than van der Waals radii.
  • Helical complexes demonstrated utility in inducing iodocyclization of 4-penten-1-ol.

Conclusions:

  • The study presents a novel class of halonium-ion-based helices.
  • These helices effectively stabilize reactive iodonium ions via halogen bonding.
  • The developed helical complexes show promise for synthetic applications in organic chemistry.