Related Experiment Video
Updated: Sep 21, 2025
Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
Molecular Ln(III)-H-E(II) Linkages (Ln=Y, Lu; E=Ge, Sn, Pb)
Max Widemann1, Frederik S W Aicher1, Martin Bonath1
1Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany.
Researchers synthesized novel low-valent tin, germanium, and lead complexes using rare-earth-metal hydrides. These organometallic compounds demonstrate unique reactivity, particularly the lead complexes exhibiting hydrogen-deuterium exchange capabilities.
Area of Science:
- Organometallic Chemistry
- Rare-Earth Chemistry
- Main Group Chemistry
Background:
- Tetravalent main group hydrides are key precursors in organometallic synthesis.
- Rare-earth metal complexes offer unique electronic and steric properties for catalysis and synthesis.
Purpose of the Study:
- To synthesize and characterize novel low-valent organometallic complexes of tin, germanium, and lead.
- To explore the reactivity of these new compounds, particularly their potential for hydrogen-isotope exchange.
Main Methods:
- Alkane-elimination reactions between aryl tin trihydrides and rare-earth-metal alkyls.
- Addition reactions of low-valent main group element dimers to rare-earth-metal hydrides.
Main Results:
- Successfully synthesized low-valent tin hydride complexes, [Cp*2 Ln(μ-H)2 SnAr*], via alkane-elimination.
- Prepared homologous germanium and lead complexes, [Cp*2 Ln(μ-H)2 EAr*] (E = Ge, Pb), using a different synthetic route.
- Observed hydrogen-deuterium exchange in the lead complexes ([Cp*2 Ln(μ-H)2 PbAr*]) with deuterated solvents and dihydrogen.
Conclusions:
- The study demonstrates a versatile approach to synthesizing low-valent organometallic compounds of tin, germanium, and lead stabilized by rare-earth metals.
- The synthesized lead complexes show promising reactivity, highlighting their potential in hydrogen-isotope exchange reactions.
Related Concept Videos
03:51Molecular Orbital Theory II
02:34Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
02:54Lewis Structures of Molecular Compounds and Polyatomic Ions
01:01Phosphodiester Linkages
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
03:35Hybridization of Atomic Orbitals II
02:27Predicting Molecular Geometry