Functional group chemistry at intramolecular frustrated Lewis pairs: substituent exchange at the Lewis acid site with 9-BBN

2013 ◽  
Vol 42 (3) ◽  
pp. 709-718 ◽  
Author(s):  
Markus Erdmann ◽  
Christian Rösener ◽  
Thorsten Holtrichter-Rößmann ◽  
Constantin G. Daniliuc ◽  
Roland Fröhlich ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Acid Site ◽  
Functional Group ◽  
Lewis Acid Site ◽  
Frustrated Lewis Pairs ◽  
Lewis Pairs

Lewis Acid Site-Promoted Single-Atomic Cu Catalyzes Electrochemical CO2 Methanation

Nano Letters ◽  
2021 ◽  
Author(s):  
Shenghua Chen ◽  
Bingqing Wang ◽  
Jiexin Zhu ◽  
Liqiang Wang ◽  
Honghui Ou ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Acid Site ◽  
Lewis Acid Site ◽  
Co2 Methanation

Development of silica-supported frustrated Lewis pairs: highly active transition metal-free catalysts for the Z-selective reduction of alkynes

2016 ◽  
Vol 6 (3) ◽  
pp. 882-889 ◽  
Author(s):  
Kai C. Szeto ◽  
Wissam Sahyoun ◽  
Nicolas Merle ◽  
Jessica Llop Castelbou ◽  
Nicolas Popoff ◽  
...  
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Selective Reduction ◽  
Frustrated Lewis Pairs ◽  
Acid Base ◽  
Metal Free ◽  
Highly Active ◽  
Active Transition ◽  
Lewis Pairs

Supported Lewis acid/base systems based have been prepared and characterized.

Bimetallic Metal-Organic Frameworks: Probing the Lewis Acid Site for CO2Conversion

Small ◽  
2016 ◽  
Vol 12 (17) ◽  
pp. 2334-2343 ◽  
Author(s):  
Ruyi Zou ◽  
Pei-Zhou Li ◽  
Yong-Fei Zeng ◽  
Jia Liu ◽  
Ruo Zhao ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Acid Site ◽  
Metal Organic Frameworks ◽  
Lewis Acid Site ◽  
Metal Organic

scholarly journals Exploiting the Electronic Tuneability of Carboranes as Supports for Frustrated Lewis Pairs

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3099 ◽  
Author(s):  
Amanda Benton ◽  
Zachariah Copeland ◽  
Stephen M. Mansell ◽  
Georgina M. Rosair ◽  
Alan J. Welch
Keyword(s):  
Lewis Acid ◽  
Michael Addition ◽  
Coupling Constants ◽  
Frustrated Lewis Pairs ◽  
Acid Component ◽  
Frustrated Lewis Pair ◽  
Lewis Pairs

The first example of a carborane with a catecholborolyl substituent, [1-Bcat-2-Ph-closo-1,2-C2B10H10] (1), has been prepared and characterized and shown to act as the Lewis acid component of an intermolecular frustrated Lewis pair in catalyzing a Michael addition. In combination with B(C6F5)3 the C-carboranylphosphine [1-PPh2-closo-1,2-C2B10H11] (IVa) is found to be comparable with PPh2(C6F5) in its ability to catalyze hydrosilylation, whilst the more strongly basic B-carboranylphosphine [9-PPh2-closo-1,7-C2B10H11] (V) is less effective and the very weakly basic species [μ-2,2ʹ-PPh-{1-(1ʹ-1ʹ,2ʹ-closo-C2B10H10)-1,2-closo-C2B10H10}] (IX) is completely ineffective. Base strengths are rank-ordered via measurement of the 1J 31P-77Se coupling constants of the phosphineselenides [1-SePPh2-closo-1,2-C2B10H11] (2), [9-SePPh2-closo-1,7-C2B10H11] (3), and [SePPh2(C6F5)] (4).

scholarly journals Lewis Acid Site and Hydrogen-Bond-Mediated Polarization Synergy in the Catalysis of Diels–Alder Cycloaddition by Band-Gap Transition-Metal Oxides

ACS Catalysis ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 701-715 ◽  
Author(s):  
Taha Salavati-fard ◽  
Efterpi S. Vasiliadou ◽  
Glen R. Jenness ◽  
Raul F. Lobo ◽  
Stavros Caratzoulas ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Transition Metal ◽  
Metal Oxides ◽  
Band Gap ◽  
Lewis Acid ◽  
Transition Metal Oxides ◽  
Acid Site ◽  
Lewis Acid Site ◽  
Diels Alder

Propane Dehydrogenation Catalyzed by Single Lewis Acid Site in Sn-Beta Zeolite

2021 ◽  
Author(s):  
Yuanyuan Yue ◽  
Jing Fu ◽  
Chuanming Wang ◽  
Pei Yuan ◽  
Xiaojun Bao ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Acid Site ◽  
Lewis Acid Site ◽  
Propane Dehydrogenation ◽  
Beta Zeolite

scholarly journals Sintesis Dan Karakterisasi H-Aluminosilikat Sebagai Katalis Sintesis Biogasoline Dari Asam Oleat

2019 ◽  
Vol 4 (2) ◽  
pp. 100
Author(s):  
Deasi Adhiani Farida ◽  
Abdulloh Abdulloh ◽  
Ahmadi Jaya Permana
Keyword(s):  
Oleic Acid ◽  
Hydrothermal Method ◽  
Lewis Acid ◽  
Acid Site ◽  
Lewis Acid Site ◽  
Bronsted Acid ◽  
Bronsted Acid Site ◽  
Brønsted Acid Site ◽  
Brönsted Acid ◽  
Cracking Reaction

ABSTRACT          Aluminosilicate can be used for cracking reaction. In this study, catalyst of H-aluminosilicate has been synthesized by hydrothermal method with ratio molar Si/Al is 20. The characterizations has been performed by XRD, FTIR and acidity test. Characterization by XRD showed that catalyst of H-aluminosilicate have structure amorphous, while FTIR showed Si-O-Al bond at 457 cm-1. The acidity test showed that catalyst of H-aluminosilicate have Brønsted acid site 0.0272 mmol/g and Lewis acid site 0.0005 mmol/g. Oleic acid was cracking at 340 oC for 3 and 5 hours. The product has been analyzed by GC-MS not showed compound forming biogasoline.Keywords: H-aluminosilicate, biogasoline, oleic acid ABSTRAK          Aluminosilikat dapat digunakan sebagai katalis dalam reaksi prengkahan. Pada penelitian ini telah dilakukan sintesis katalis H-aluminosilikat melalui metode hidrotermal dengan rasio Si/Al sebesar 20. Karakterisasi yang telah dilakukan meliputi uji XRD, FTIR, dan keasaman.Hasil XRD menunjukkan katalis H-aluminosilikat berbentuk amorf, sedangkan pada FTIR menunjukkan ikatan Si-O-Al pada bilangan gelombang 457 cm-1. Uji situs asam menunjukkan katalis H-aluminosilikat memiliki jumlah asam Brønsted sebesar 0.0272 mmol/g dan jumlah sisi asam Lewis sebesar 0.0005 mmol/g. Proses perengkahan asam oleat telah dilakukan pada suhu 340oC selama 3 jam dan 5 jam. Produk cracking yang diuji dengan GC-MS tidak menunjukkan pembentukan senyawa biogasoline.Kata kunci: H-aluminosilikat, biogasoline, asam oleat

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