Electrochemical-Enabled Rhodium-Catalyzed [4+2] Annulations of Arenes with Alkynes

2021 ◽  
Author(s):  
Zi-Chen Wang ◽  
Rui-Tao Li ◽  
Qiang Ma ◽  
Jia-Yi Chen ◽  
Shao-Fei Ni ◽  
...  
Keyword(s):  
Rhodium Catalyst ◽  
Stoichiometric Amount

Herein, the electrochemically driven, Rh(III)-catalyzed regioselective annulations of arenes with alkynes have been established. The strategy combined by rhodium catalyst with electricity not only avoids the need for stoichiometric amount...

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

Phase Behavior of Hydrogenation of 2-tert-Butylphenol over a Charcoal-Supported Rhodium Catalyst in Carbon Dioxide Solvent†

2009 ◽  
Vol 54 (5) ◽  
pp. 1610-1612 ◽  
Author(s):  
Norihito Hiyoshi ◽  
Yoshio Masuda ◽  
Osamu Sato ◽  
Aritomo Yamaguchi ◽  
Chandrashekhar V. Rode ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Phase Behavior ◽  
Rhodium Catalyst ◽  
Supported Rhodium Catalyst

Nonaqueous Biphasic Hydroformylation of Long Chain Alkenes Catalyzed by Water Soluble Phosphine Rhodium Catalyst with Polyethylene Glycol Instead of Water

2017 ◽  
Vol 148 (1) ◽  
pp. 438-442 ◽  
Author(s):  
Yuanjiang Zhao ◽  
Yanli Liu ◽  
Jianzhang Wei ◽  
Haiyan Fu ◽  
Xueli Zheng ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Rhodium Catalyst ◽  
Water Soluble ◽  
Water Soluble Phosphine ◽  
Long Chain

Low Rhodium Catalyst Technology for Gasoline and FFV Applications

2009 ◽  
Author(s):  
Jeffrey P. Wuttke ◽  
Michael G. Zammit ◽  
Douglas J. Ball ◽  
John G. Nunan
Keyword(s):  
Rhodium Catalyst

scholarly journals Recovery of Hg(0) from the Aqueous Hg(I/II) Present in Analyte Solution after Quantitative Determination of Iron

2013 ◽  
Vol 2013 ◽  
pp. 1-3
Author(s):  
Suman K. Giri ◽  
Nigamananda Das
Keyword(s):  
Aqueous Solutions ◽  
Quantitative Determination ◽  
Simple Method ◽  
Stoichiometric Amount ◽  
Analyte Solution

An easy and feasible approach to recover HgCl2, used in quantitative determination of iron values, as Hg(0) was described. Both Hg(I) and Hg(II), present in the solution after quantitative determination of iron, was completely reduced to Hg(0) by the addition of aluminium chips in more slightly excess than the stoichiometric amount. The purity of recovered Hg(0) was verified by comparing the value of density with pure mercury. This simple method may be useful to remove the mercury from other waste aqueous solutions before their discharge into the environment.

Tuning cis-decalin Selectivity in Naphthalene Hydrogenation Over Carbon-supported Rhodium Catalyst Under Supercritical Carbon dioxide

2006 ◽  
Vol 106 (3-4) ◽  
pp. 133-138 ◽  
Author(s):  
Norihito Hiyoshi ◽  
Tomoya Inoue ◽  
Chandrashekhar V. Rode ◽  
Osamu Sato ◽  
Masayuki Shirai
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Rhodium Catalyst ◽  
Supported Rhodium Catalyst ◽  
Supercritical Carbon

Highly Selective Asymmetric Hydrogenation Using a Three Hindered Quadrant Bisphosphine Rhodium Catalyst

2004 ◽  
Vol 126 (19) ◽  
pp. 5966-5967 ◽  
Author(s):  
Garrett Hoge ◽  
He-Ping Wu ◽  
William S. Kissel ◽  
Derek A. Pflum ◽  
Derek J. Greene ◽  
...  
Keyword(s):  
Asymmetric Hydrogenation ◽  
Rhodium Catalyst

The Adsorption and Chemistry of Tripropyl phosphate (TPP) into Microporous and Mesoporous NaX Zeolites

2011 ◽  
Vol 1304 ◽  
Author(s):  
Qingguo Meng ◽  
David C. Doetschman ◽  
Apostolos K. Rizos ◽  
Min-Hong Lee ◽  
Jürgen T. Schulte ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Properties ◽  
Nmr Spectra ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nax Zeolite ◽  
Stoichiometric Amount ◽  
Polydiallyldimethylammonium Chloride ◽  
Adsorption Analysis

ABSTRACTAdsorption and chemistry of tripropylphosphate (TPP) in mesoporous NaX zeolite, which was templated by cationic templated polymer (polydiallyldimethylammonium chloride, PDADMAC) with two different length chains, was investigated. The structural properties of the zeolites were characterized by X-ray diffraction (XRD) and nitrogen adsorption analysis. The chemical activities of different zeolites toward the decomposition of TPP were determined with solid state 31P NMR spectra. After exposure of zeolites to TPP was sufficient and equilibrium was reached, a stoichiometric amount of water was also adsorbed and hydrolysis was observed. The TPP decomposition yields in different NaX zeolites were compared.

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