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Related Experiment Video

Updated: Nov 3, 2025

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

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

Published on: July 27, 2022

Supramolecular Frameworks Based on Rhenium Clusters Using the Synthons Approach.

Nathalie Audebrand¹, Antoine Demont¹, Racha El Osta¹

¹ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, CNRS, Univ Rennes, F-35000 Rennes, France.

Molecules (Basel, Switzerland)

|June 2, 2021

Summary

This study details the synthesis of five new rhenium cluster compounds through ligand exchange with pyrazine. The structures reveal how hydration rates influence the assembly of these complex supramolecular frameworks.

Keywords:

crystal engineering rhenium sulfide cluster supramolecular framework synthon topology

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Last Updated: Nov 3, 2025

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Published on: April 9, 2018

Area of Science:

Inorganic Chemistry
Materials Science
Crystallography

Background:

Rhenium clusters are known for their unique structural and electronic properties.
Ligand exchange reactions are crucial for modifying cluster properties and creating new materials.
Understanding supramolecular assembly is key to designing advanced functional materials.

Purpose of the Study:

To synthesize and characterize novel rhenium cluster compounds.
To investigate the effect of pyrazine as a ligand in rhenium cluster chemistry.
To elucidate the role of hydration and synthons in the formation of supramolecular frameworks.

Main Methods:

Reaction of K4[Re6Si8(OH)6]·8H2O with pyrazine in aqueous salt solutions.
Isolation and characterization of five new rhenium cluster compounds.
X-ray crystallography to determine the crystal structures and supramolecular assembly.

Main Results:

Five new rhenium cluster compounds were successfully synthesized and characterized.
The compounds exhibit trans- or cis- [{Re6Si8}(Pz)a2(OH)a4-x(H2O)ax]x-2 cluster units.
Supramolecular frameworks are formed through stacking, H-bonding, and H3O2- bridges, influenced by hydration rates.

Conclusions:

Pyrazine readily undergoes apical ligand exchange with rhenium clusters.
The hydration rate of the cluster unit dictates the nature of the synthons responsible for supramolecular assembly.
This work expands the library of rhenium cluster compounds and provides insights into their structural diversity.