A P-H Functionalized Al/P Frustrated Lewis Pair: Substrate Activation and Selective Hydrogen Transfer
Lukas Keweloh1, Hans Klöcker1, Ernst-Ulrich Würthwein2
1Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany.
Angewandte Chemie (International Ed. in English)
|February 3, 2016
Summary
Researchers created a novel P-H functionalized frustrated Lewis pair (FLP) via hydroalumination. This unique FLP exhibits new substrate activation pathways involving hydrogen transfer, leading to unusual phosphaurea, iminophosphine, and phosphanyltriazene compounds.
Area of Science:
- Organometallic Chemistry
- Main Group Chemistry
Background:
- Frustrated Lewis pairs (FLPs) are key to small molecule activation.
- Phosphorus-containing compounds offer unique reactivity.
Purpose of the Study:
- To synthesize and characterize a novel P-H functionalized frustrated Lewis pair.
- To investigate the reactivity and substrate activation mechanisms of the new FLP.
Main Methods:
- Hydroalumination of an alkynylphosphine precursor.
- Spectroscopic characterization (NMR, X-ray crystallography).
- Reactivity studies with various substrates.
Main Results:
- Successful synthesis of an unprecedented P-H functionalized FLP.
- The P-H group did not impede typical FLP behavior.
- A new reaction pathway involving hydrogen transfer was observed.
- Unusual phosphaurea, iminophosphine, and phosphanyltriazene products were formed.
Conclusions:
- P-H functionalized FLPs represent a new class of reactive species.
- The unique reactivity expands the scope of FLP chemistry.
- This work opens avenues for synthesizing novel phosphorus-containing compounds.
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