Related Experiment Video
Updated: Jul 10, 2026

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
Synthesis and electrochemical study of the first tetrazolate hexanuclear rhenium cluster complex
Lisa F Szczepura1, Meghan K Oh, Stanley A Knott
1Department of Chemistry, Illinois State University, Campus Box 4160, Normal, IL 61790, USA. lfszcze@ilstu.edu
Researchers synthesized the first tetrazolato-rhenium complexes, [Re(6)Se(8)(PEt(3))(5)(1,5-MeN(4)C)](+) and [Re(6)Se(8)(PEt(3))(5)(2,5-MeN(4)C)](+), through a novel reaction pathway.
Area of Science:
- Inorganic Chemistry
- Coordination Chemistry
- Organometallic Chemistry
Background:
- Rhenium clusters are known for their unique electronic and structural properties.
- The synthesis of novel heterocyclic ligands for transition metal complexes remains an active area of research.
Purpose of the Study:
- To report the synthesis and characterization of the first tetrazolato-rhenium complexes.
- To explore the reactivity of rhenium clusters with azide sources.
Main Methods:
- Reaction of a rhenium acetonitrile complex with tetrabutylammonium azide.
- Isolation and characterization of the resulting linkage isomers using spectroscopic techniques.
Main Results:
- Successful synthesis of two linkage isomers: [Re(6)Se(8)(PEt(3))(5)(1,5-MeN(4)C)](+) and [Re(6)Se(8)(PEt(3))(5)(2,5-MeN(4)C)](+).
- These represent the first reported examples of tetrazolato-rhenium complexes.
Conclusions:
- The reaction provides a new route to functionalized rhenium clusters.
- The discovery expands the scope of known rhenium coordination compounds.
Related Concept Videos
Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Thermal and Photochemical Electrocyclic Reactions: Overview
Coordination Number and Geometry
Valence Bond Theory
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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.

