scholarly journals Reversible O–H bond activation by an intramolecular frustrated Lewis pair

2019 ◽  
Vol 48 (9) ◽  
pp. 2896-2899 ◽  
Author(s):  
Petra Vasko ◽  
M. Ángeles Fuentes ◽  
Jamie Hicks ◽  
Simon Aldridge
Keyword(s):  
Bond Activation ◽  
Frustrated Lewis Pairs ◽  
Frustrated Lewis Pair ◽  
Lewis Pairs

The interactions of the O–H bonds in alcohols, water and phenol with dimethylxanthene-derived frustrated Lewis pairs (FLPs) have been probed.

Bis(pentafluorophenyl)phenothiazylborane – A Pseudo Frustrated Radical Pair for the Catalytic Dehydrocoupling of Stannanes

2020 ◽  
Author(s):  
Jordan N. Bentley ◽  
Ekadashi Pradhan ◽  
Tao Zeng ◽  
Christopher B. Caputo
Keyword(s):  
Small Molecules ◽  
Computational Analysis ◽  
Bond Activation ◽  
Radical Pair ◽  
Frustrated Lewis Pairs ◽  
Frustrated Lewis Pair ◽  
Lewis Pairs

The understanding of the mechanism by which frustrated Lewis pairs activate small molecules has been evolving with the discovery that both heterolytic and homolytic bond activation is possible. Herein we characterized a novel Lewis acidic aminoborane containing a phenothiazyl substituent and demonstrate its potential to catalytically promote the dehydrocoupling of tin hydrides. The reactivity observed implies this species promotes homolytic bond activation, however computational analysis suggests a heterolytic mechanism for this reaction. This result represents the first frustrated Lewis pair system to blur the lines between heterolytic and homolytic reactivity.

Bis(pentafluorophenyl)phenothiazylborane – A Pseudo Frustrated Radical Pair for the Catalytic Dehydrocoupling of Stannanes

2020 ◽  
Author(s):  
Jordan N. Bentley ◽  
Ekadashi Pradhan ◽  
Tao Zeng ◽  
Christopher B. Caputo
Keyword(s):  
Small Molecules ◽  
Computational Analysis ◽  
Bond Activation ◽  
Radical Pair ◽  
Frustrated Lewis Pairs ◽  
Frustrated Lewis Pair ◽  
Lewis Pairs

The understanding of the mechanism by which frustrated Lewis pairs activate small molecules has been evolving with the discovery that both heterolytic and homolytic bond activation is possible. Herein we characterized a novel Lewis acidic aminoborane containing a phenothiazyl substituent and demonstrate its potential to catalytically promote the dehydrocoupling of tin hydrides. The reactivity observed implies this species promotes homolytic bond activation, however computational analysis suggests a heterolytic mechanism for this reaction. This result represents the first frustrated Lewis pair system to blur the lines between heterolytic and homolytic reactivity.

Bis(perchlorocatecholato)silane and Heteroleptic Bidonors: Hidden Frustrated Lewis Pairs by Ring Strain

2021 ◽  
Author(s):  
Deborah Hartmann ◽  
Sven Braner ◽  
Lutz Greb
Keyword(s):  
Ammonia Borane ◽  
Frustrated Lewis Pairs ◽  
Ring Strain ◽  
Frustrated Lewis Pair ◽  
Lewis Pairs

Bis(perchlorocatecholato)silane and bidentate N,N- or N,P-heteroleptic donors form hexacoordinated complexes. Depending on the ring strain and hemilability in the adducts, Frustrated Lewis pair reactivity with aldehydes and catalytic ammonia borane...

Turning Frustration into Bond Activation: A Theoretical Mechanistic Study on Heterolytic Hydrogen Splitting by Frustrated Lewis Pairs

2008 ◽  
Vol 120 (13) ◽  
pp. 2469-2472 ◽  
Author(s):  
Tibor András Rokob ◽  
Andrea Hamza ◽  
András Stirling ◽  
Tibor Soós ◽  
Imre Pápai
Keyword(s):  
Bond Activation ◽  
Mechanistic Study ◽  
Frustrated Lewis Pairs ◽  
Lewis Pairs

Metal-Free Iodoperfluoroalkylation: Photocatalysis versus Frustrated Lewis Pair Catalysis

Synthesis ◽  
2020 ◽  
Vol 53 (01) ◽  
pp. 123-134
Author(s):  
Constantin Czekelius ◽  
Lucas Helmecke ◽  
Michael Spittler ◽  
Bernd M. Schmidt
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Reaction Pathways ◽  
Frustrated Lewis Pairs ◽  
Metal Free ◽  
Comprehensive Account ◽  
Frustrated Lewis Pair ◽  
Catalytic Metal ◽  
Lewis Pairs

A comparison of two catalytic, metal-free iodoperfluoro­alkylation protocols is presented. Frustrated Lewis pairs [ t Bu3P/B(C6F5)3] or phosphines/phosphites under visible light irradiation efficiently mediate the functionalization of non-activated alkenes and alkynes. A comprehensive account of the corresponding substrate scopes as well as insights into the mechanistic details of both reaction pathways are provided.

Frustrated Lewis Pairs Comprising Nitrogen Lewis Acids for Si–H Bond Activation

2020 ◽  
Vol 132 (52) ◽  
pp. 23682-23685
Author(s):  
Idan Avigdori ◽  
Alla Pogoreltsev ◽  
Alexander Kaushanski ◽  
Natalia Fridman ◽  
Mark Gandelman
Keyword(s):  
Lewis Acids ◽  
Bond Activation ◽  
Frustrated Lewis Pairs ◽  
Lewis Pairs

Using frustrated Lewis pairs to explore C–F bond activation

2020 ◽  
Vol 49 (4) ◽  
pp. 1319-1324
Author(s):  
Alvaro I. Briceno-Strocchia ◽  
Timothy C. Johnstone ◽  
Douglas W. Stephan
Keyword(s):  
Bond Activation ◽  
Frustrated Lewis Pairs ◽  
Lewis Pairs

Our interest in C–F bond activation prompted an investigation of the reactions of PhC(O)CF3 with a superbasic proazaphosphatrane (Verkade's base) and a corresponding FLP.

C–H Bond Activation by Radical Ion Pairs Derived from R3P/Al(C6F5)3 Frustrated Lewis Pairs and N2O

2013 ◽  
Vol 135 (17) ◽  
pp. 6446-6449 ◽  
Author(s):  
Gabriel Ménard ◽  
Jillian A. Hatnean ◽  
Hugh J. Cowley ◽  
Alan J. Lough ◽  
Jeremy M. Rawson ◽  
...  
Keyword(s):  
Bond Activation ◽  
Ion Pairs ◽  
Frustrated Lewis Pairs ◽  
Lewis Pairs

scholarly journals Tuning Activity and Selectivity During Alkyne Activation by Gold(I)/Platinum(0) Frustrated Lewis Pairs

2020 ◽  
Author(s):  
Nereida Hidalgo ◽  
Juan Jose Moreno ◽  
Marina Pérez-Jiménez ◽  
Celia Maya ◽  
Joaquin López-Serrano ◽  
...  
Keyword(s):  
Transition Metals ◽  
Computational Analysis ◽  
Product Distribution ◽  
Frustrated Lewis Pairs ◽  
Cooperative Action ◽  
Frustrated Lewis Pair ◽  
Frustrated Systems ◽  
Selection Of ◽  
Lewis Pairs

Introducing transition metals into frustrated Lewis pair systems has attracted considerable attention in recent years. Here we report a selection of three metal-only frustrated systems based on Au(I)/Pt(0) combinations and their reactivity towards alkynes. We have inspected the activation of the simplest alkyne, namely acetylene, as well as of other internal and terminal triply bonded hydrocarbons. The gold(I) fragments are stabilized by three bulky phosphines bearing terphenyl groups. We have observed that subtle modifications on the substituents of these ligands proved critical to control the regioselectivity of acetylene activation and the product distribution resulting from C(sp)—H cleavage of phenylacetylene. A mechanistic picture based on experimental observations and computational analysis is provided. As a result of the cooperative action of the two metals of the frustrated pairs, several uncommon heterobimetallic structures have been fully characterized.

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