scholarly journals Base-induced reversible H2 addition to a single Sn(ii) centre

2018 ◽  
Vol 9 (46) ◽  
pp. 8716-8722 ◽  
Author(s):  
Roland C. Turnell-Ritson ◽  
Joshua S. Sapsford ◽  
Robert T. Cooper ◽  
Stella S. Lee ◽  
Tamás Földes ◽  
...  
Keyword(s):  
Main Group ◽  
Single Site ◽  
Pair Type ◽  
Frustrated Lewis Pair ◽  
H2 Addition

A ‘frustrated Lewis pair’-type mechanism allows the first observation of reversible H2 addition to a single-site main-group complex.

Borocation catalysis

2017 ◽  
Vol 46 (15) ◽  
pp. 4874-4887 ◽  
Author(s):  
P. Eisenberger ◽  
C. M. Crudden
Keyword(s):  
Pair Type ◽  
Frustrated Lewis Pair ◽  
Catalytic Reactivity

The synthesis, stability and catalytic reactivity of borocations are described in the context of their reaction in frustrated Lewis pair-type processes.

Triple Frustrated Lewis Pair‐Type Reactivity on a Single Rare‐Earth Metal Center

2020 ◽  
Vol 26 (24) ◽  
pp. 5354-5359 ◽  
Author(s):  
Xiong Sun ◽  
Wei Su ◽  
Kaiying Shi ◽  
Zhuoyi Xie ◽  
Congqing Zhu
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Metal Center ◽  
Pair Type ◽  
Frustrated Lewis Pair

scholarly journals Front Cover: A Phosphinine‐Derived 1‐Phospha‐7‐Bora‐Norbornadiene: Frustrated Lewis Pair Type Activation of Triple Bonds (Chem. Eur. J. 35/2020)

2020 ◽  
Vol 26 (35) ◽  
pp. 7731-7731
Author(s):  
Julia Leitl ◽  
Andrew R. Jupp ◽  
Evi R. M. Habraken ◽  
Verena Streitferdt ◽  
Peter Coburger ◽  
...  
Keyword(s):  
Pair Type ◽  
Front Cover ◽  
Triple Bonds ◽  
Frustrated Lewis Pair

scholarly journals Activation and Functionalization of C–C σ-Bonds of Alkylidene Cyclopropanes at Main Group Centers

2020 ◽  
Author(s):  
Mark Crimmin ◽  
Richard Y Kong
Keyword(s):  
Bond Activation ◽  
Substrate Binding ◽  
Oxidative Addition ◽  
Main Group ◽  
Single Site ◽  
Mechanistic Studies ◽  
Metal Bond ◽  
Main Group Metal ◽  
Metal Metal ◽  
Group Center

Aluminum(I) and magnesium(I) compounds are reported for the C–C s-bond activation of strained alkylidene cyclopropanes. These reactions result in the formal addition of the C–C s-bond to main group center either at a single site (Al) or across a metal–metal bond (Mg–Mg). Mechanistic studies suggest that rather than occurring by a concerted oxidative addition, these reactions involve stepwise processes in which substrate binding to the main group metal acts as a precursor to a- or b-alkyl migration steps that break the C–C s-bond. This mechanistic understanding is used to develop the magnesium-catalyzed hydrosilylation of the C–C s-bonds of alkylidene cyclopropanes.

scholarly journals Olefin Oligomerization by Main Group Ga3+ and Zn2+ Single Site Catalysts

2020 ◽  
Author(s):  
Nicole LiBretto ◽  
Yinan Xu ◽  
Aubrey Quigley ◽  
Ethan Edwards ◽  
Rhea Nargund ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Equilibrium Distribution ◽  
Transition Metal Ions ◽  
Main Group ◽  
Single Site ◽  
Main Group Metal ◽  
Hydride Elimination ◽  
Single Site Catalysts ◽  
Olefin Oligomerization

Abstract In heterogeneous catalysis, olefin oligomerization is typically performed on immobilized transition metal ions, such as Ni2+ and Cr3+. Here we report that silica-supported, single site catalysts containing immobilized, main group Zn2+ and Ga3+ ions catalyze ethylene and propylene oligomerization to an equilibrium distribution of linear olefins with rates similar to that of Ni2+. The molecular weight distribution of products formed on Zn2+ is similar to Ni2+; while Ga3+ forms higher molecular weight olefins. In situ spectroscopic and computational studies suggest that oligomerization unexpectedly occurs by the Cossee-Arlman mechanism via metal hydride and metal alkyl intermediates formed during olefin insertion and β-hydride elimination elementary steps. Initiation of the catalytic cycle is proposed to occur by heterolytic C-H dissociation of ethylene, which occurs at about 250°C where oligomerization is catalytically relevant. This work reports new chemistry for main group metal catalysts with potential for development of new olefin processes.

Stimuli-Responsive Frustrated Lewis-Pair-Type Reactivity of a Tungsten Iminoazaphosphiridine Complex

2015 ◽  
Vol 21 (27) ◽  
pp. 9650-9655 ◽  
Author(s):  
José Manuel Villalba Franco ◽  
Gregor Schnakenburg ◽  
Takahiro Sasamori ◽  
Arturo Espinosa Ferao ◽  
Rainer Streubel
Keyword(s):  
Pair Type ◽  
Stimuli Responsive ◽  
Frustrated Lewis Pair
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