Related Experiment Video
Updated: Jun 19, 2026

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
Hemiacetals in dynamic covalent chemistry: formation, exchange, selection, and modulation processes
Dusan Drahonovský1, Jean-Marie Lehn
1ISIS, Université de Strasbourg, 67083 Strasbourg, France.
Reversible hemiacetal formation is key in covalent dynamic chemistry. Stabilizing heterocyclic hemiacetals with protons or metal ions creates dynamic systems with rapid responses and component selection.
Area of Science:
- Organic Chemistry
- Supramolecular Chemistry
- Materials Science
Background:
- Covalent dynamic chemistry utilizes reversible reactions to create adaptable materials.
- Hemiacetals are key intermediates in organic synthesis and polymer chemistry.
- Controlling the stability and dynamics of covalent bonds is crucial for advanced applications.
Purpose of the Study:
- To explore the stabilization of heterocyclic hemiacetals.
- To investigate the dynamic properties of these stabilized systems.
- To demonstrate the utility of hemiacetal systems in covalent dynamic chemistry.
Main Methods:
- Synthesis of heterocyclic hemiacetals.
- Stabilization studies using protonation and metal cation coordination.
- Analysis of system dynamics, response times, and component selection.
Main Results:
- Heterocyclic hemiacetals can be effectively stabilized by protonation or metal cation coordination.
- The resulting stabilized hemiacetal systems exhibit high dynamism.
- These systems demonstrate fast response characteristics and selective component interactions.
Conclusions:
- Stabilized heterocyclic hemiacetals are valuable tools in covalent dynamic chemistry.
- The dynamic and responsive nature of these systems enables novel material design.
- Protonation and metal coordination offer effective strategies for controlling hemiacetal chemistry.
Related Concept Videos
Aldehydes and Ketones with Alcohols: Hemiacetal Formation
Valence Bond Theory
Valence Bond Theory
Thermal Electrocyclic Reactions: Stereochemistry
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Regioselective Formation of Enolates
Complexation Equilibria: Overview
The equilibrium constant of the complexation reaction is represented as the formation constant...

