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Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
Published on: February 20, 2020
Lewis acid stabilized methylidene and oxoscandium complexes
Jennifer Scott1, Hongjun Fan, Benjamin F Wicker
1Department of Chemistry, Molecular Structure Center, and the School of Informatics, Indiana University, Bloomington, Indiana 47405, USA.
Journal of the American Chemical Society
|October 14, 2008
Summary
Researchers synthesized a novel methylidene scandium complex stabilized by Lewis acids. This complex undergoes reactions with amines and ketones, yielding olefins and a unique oxoscandium compound.
Area of Science:
- Organometallic Chemistry
- Scandium Complexes
- Catalysis
Background:
- Methylidene ligands are crucial intermediates in organometallic chemistry.
- Scandium complexes offer unique reactivity due to their electronic properties.
Purpose of the Study:
- To synthesize and characterize a novel methylidene scandium complex.
- To investigate the reactivity of the methylidene scandium complex with various substrates.
Main Methods:
- Synthesis of the methylidene scandium complex via reaction with trimethylaluminum.
- Crystallographic characterization and Density Functional Theory (DFT) analysis.
- Reactivity studies with amine and ketone substrates.
Main Results:
- Successful synthesis and structural elucidation of the methylidene scandium complex.
- Observation of a Brønsted acid-base reaction with an amine.
- Quantitative formation of an olefin and a novel oxoscandium complex upon reaction with benzophenone.
Conclusions:
- The methylidene scandium complex exhibits unique reactivity patterns.
- Lewis acid stabilization is key to the complex's stability and reactivity.
- The complex serves as a precursor to olefins and oxoscandium compounds.
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