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Updated: Apr 1, 2026

Preparation and Use of Carbonyl-decorated Carbenes in the Activation of White Phosphorus

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Published on: October 3, 2014

A Neutral Silicon/Phosphorus Frustrated Lewis Pair.

Benedikt Waerder¹, Martin Pieper¹, Leif A Körte¹

¹Lehrstuhl für Anorganische Chemie und Strukturchemie and Centrum für molekulare Materialien CM2, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld (Germany).

Angewandte Chemie (International Ed. in English)

|October 2, 2015

Summary

Researchers developed a novel neutral silane-based Frustrated Lewis Pair (FLP) system. This new FLP activates small molecules like CO2 and SO2 and cleaves hydrogen, expanding FLP chemistry applications.

Keywords:

carbon dioxide frustrated Lewis pairs hydrogen splitting phosphorus silicon

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Light Enhanced Hydrofluoric Acid Passivation: A Sensitive Technique for Detecting Bulk Silicon Defects

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Published on: January 4, 2016

Area of Science:

Inorganic Chemistry
Organosilicon Chemistry
Catalysis

Background:

Frustrated Lewis pairs (FLPs) are crucial for small molecule activation, typically utilizing boron or aluminum Lewis acids.
Existing FLP systems are limited, with few based on zinc and only two on silicon-based silicenium cations.
There is a need for novel FLP systems, particularly those based on neutral silanes.

Purpose of the Study:

To synthesize and characterize the first Frustrated Lewis Pair (FLP) system based on a neutral silane.
To investigate the small molecule activation capabilities of this novel silane-based FLP, including hydrogen cleavage and reactions with CO2 and SO2.
To elucidate the structural features of the FLP and its adducts.

Main Methods:

Synthesis of a neutral silane FLP, (C2F5)3SiCH2P(tBu)2, using highly electronegative C2F5 groups.
Reactions of the FLP with small molecules such as H2, CO2, and SO2.
Structural characterization of the FLP and its adducts using X-ray diffraction.
Confirmation of hydrogen activation via H/D scrambling reactions.

Main Results:

Successful preparation of the first neutral silane-based FLP, (C2F5)3SiCH2P(tBu)2.
Demonstrated capability of the FLP to cleave hydrogen (H2).
Observed addition reactions of the FLP with carbon dioxide (CO2) and sulfur dioxide (SO2).
Structural elucidation of the FLP, its CO2 and SO2 adducts, and a CO2 decomposition product via X-ray diffraction.

Conclusions:

The development of a neutral silane-based FLP significantly expands the scope of FLP chemistry.
This novel FLP system exhibits versatile reactivity, including H2 activation and CO2/SO2 capture.
The findings pave the way for new applications of silicon-based FLPs in small molecule activation and catalysis.