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Lech Skulski - One of the best experts on this subject based on the ideXlab platform.
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Easy Preparation of [Bis(trifluoroacetoxy)iodo]arenes from Iodoarenes, with Sodium Percarbonate as the Oxidant
2013Co-Authors: Pawel Kazmierczak, Lech SkulskiAbstract:Abstract: Easy and effective preparations of the nearly pure [bis(trifluoroacetoxy)iodo]arenes, ArI(OCOCF)3, from some iodoarenes, ArI, are reported, using an anhydrous Sodium Percarbonate/(CF3CO)2O/CH2Cl2 system. The colorless, freshly prepared ArI(OCOCF3)2 thus obtained were 98-99 % pure (by iodometry)
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Eco-friendly Oxidative Iodination of Various Arenes with Sodium Percarbonate as the Oxidant†
Molecules, 2005Co-Authors: Agnieszka Zielińska, Lech SkulskiAbstract:Abstract: Six easy laboratory procedures are presented for the oxidative iodination of various aromatics, mostly arenes, with either molecular iodine or potassium iodide (used as the sources of iodinating species, I + or I 3+ ), in the presence of Sodium Percarbonate (SPC), a stable, cheap, easy to handle, and eco-friendly commercial oxidant. Keywords: Iodoarenes, arenes, iodine, Sodium iodide, Sodium Percarbonate as oxidant Introduction Aromatic iodides are generally more reactive, albeit are more costly, than the respective bromides and chlorides. There are many different methods, direct and indirect, for their synthesis [1], and they are widely used in organic synthesis in chemical laboratories and, to a lesser extent, in industry. Moreover, they are able to form a variety of aromatic hypervalent iodine derivatives, which have found increasing applications in modern organic synthesis [2]. Our two latest reviews [3, 4] relate and explain a variety of direct oxidative iodination methods, suitable for both activated and deactivated aromatics, mostly arenes, devised in our laboratory since 1990, as well as our novel methods for preparing several classes of aromatic hypervalent iodine compounds, easily attainable from aromatic iodides. See also our former paper [5].
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Eco-friendly Oxidative Iodination of Various Arenes with Sodium Percarbonate as the Oxidant†
Molecules (Basel Switzerland), 2005Co-Authors: Agnieszka Zielińska, Lech SkulskiAbstract:Six easy laboratory procedures are presented for the oxidative iodination ofvarious aromatics, mostly arenes, with either molecular iodine or potassium iodide (usedas the sources of iodinating species, I or I3 ), in the presence of Sodium Percarbonate(SPC), a stable, cheap, easy to handle, and eco-friendly commercial oxidant.
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Easy Preparation of (Bis(trifluoroacetoxy)iodo)arenes from Iodoarenes, with Sodium Percarbonate as the Oxidant †
Molecules, 2002Co-Authors: Pawel Kazmierczak, Lech SkulskiAbstract:Easy and effective preparations of the nearly pure [bis(trifluoroacetoxy)-iodo]arenes, ArI(OCOCF)3, from some iodoarenes, ArI, are reported, using an anhydrous Sodium Percarbonate/(CF3CO)2O/CH2Cl2 system. The colorless, freshly prepared ArI(OCOCF3)2 thus obtained were 98-99% pure (by iodometry).
Davood Habibi - One of the best experts on this subject based on the ideXlab platform.
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catalytic oxidation of sulfides to sulfoxides using Sodium perborate and or Sodium Percarbonate and silica sulfuric acid in the presence of kbr
Catalysis Communications, 2009Co-Authors: Davood Habibi, Mohammad Ali Zolfigol, Malihe Safaiee, Atefeh Shamsian, Arash GhorbanichoghamaraniAbstract:Chemoselective catalytic oxidation of sulfides has been developed. A variety of aliphatic and aromatic sulfides are subjected to the sulfoxidation reaction by treatment of Sodium perborate (SPB) and/or Sodium Percarbonate (SPC), silica sulfuric acid (SSA) and catalytic amounts of KBr in the presence of wet SiO2 (50% w/w) in dichloromethane at room temperature with moderate to good yields.
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Catalytic oxidation of sulfides to sulfoxides using Sodium perborate and/or Sodium Percarbonate and silica sulfuric acid in the presence of KBr
Catalysis Communications, 2009Co-Authors: Davood Habibi, Mohammad Ali Zolfigol, Malihe Safaiee, Atefeh Shamsian, Arash Ghorbani-choghamaraniAbstract:Chemoselective catalytic oxidation of sulfides has been developed. A variety of aliphatic and aromatic sulfides are subjected to the sulfoxidation reaction by treatment of Sodium perborate (SPB) and/or Sodium Percarbonate (SPC), silica sulfuric acid (SSA) and catalytic amounts of KBr in the presence of wet SiO2 (50% w/w) in dichloromethane at room temperature with moderate to good yields.
B. Muthukumaran - One of the best experts on this subject based on the ideXlab platform.
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Influence of fuel and media on membraneless Sodium Percarbonate fuel cell
Ionics, 2014Co-Authors: K. Ponmani, M. Gowdhamamoorthi, S. Kiruthika, S. Durga, B. MuthukumaranAbstract:This paper reports the media flexibility of membraneless Sodium Percarbonate fuel cell (MLSPCFC) using acid/alkaline bipolar electrolyte in which the anode is in acidic media while the cathode is in alkaline media, or vice versa. Investigation of the cell operation is conducted by using formic acid as a fuel and Sodium Percarbonate as an oxidant for the first time under ‘acid–alkaline media’ configurations. The MLSPCFC architecture enables interchangeable operation with different media combinations. The experimental results indicate that operating under acid–alkaline media conditions significantly improves the fuel cell performance compared with all-acidic and all-alkaline conditions. The effects of flow rates and the concentrations of various species at both the anode and cathode on the cell performance are also investigated. It has been demonstrated that the laminar flow-based microfluidic membraneless fuel cell can reach a maximum power density of 25.62 mW cm^−2 with a fuel mixture flow rate of 0.3 mL min^−1 at room temperature.
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Enhanced Performance of Membraneless Sodium Percarbonate Fuel Cells
Journal of Materials, 2013Co-Authors: M. Gowdhamamoorthi, A. Arun, S. Kiruthika, B. MuthukumaranAbstract:This paper presents the continuous flow operation of membraneless Sodium Percarbonate fuel cell (MLSPCFC) using acid/alkaline bipolar electrolyte. In the acid/alkaline bipolar electrolyte, Percarbonate works both as an oxidant as well as reductant. Sodium Percarbonate affords hydrogen peroxide in aqueous medium. The cell converts the energy released by H2O2 decomposition with H
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Enhanced Performance of Membraneless Sodium Percarbonate Fuel Cells
Hindawi Limited, 2013Co-Authors: M. Gowdhamamoorthi, A. Arun, S. Kiruthika, B. MuthukumaranAbstract:This paper presents the continuous flow operation of membraneless Sodium Percarbonate fuel cell (MLSPCFC) using acid/alkaline bipolar electrolyte. In the acid/alkaline bipolar electrolyte, Percarbonate works both as an oxidant as well as reductant. Sodium Percarbonate affords hydrogen peroxide in aqueous medium. The cell converts the energy released by H2O2 decomposition with H+ and OH− ions into electricity and produces water and oxygen. At room temperature, the laminar flow based microfluidic membraneless fuel cell can reach a maximum power density of 28 mW/cm2 with the molar ratio of [Percarbonate]/[NaOH] = 1 as fuel and [Percarbonate]/[H2SO4] = 2 as oxidant. The paper reports for the first time the use of Sodium Percarbonate as the oxidant and reductant. The developed fuel cell emits no CO2 and features no proton exchange membrane, inexpensive catalysts, and simple planar structure, which enables high design flexibility and easy integration of the microscale fuel cell into actual microfluidic systems and portable power applications
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Electrocatalyzed Oxidation of Methanol on Carbon Supported Platinum Electrode in Membraneless Sodium Percarbonate Fuel Cells (MLSPCFC)
2013Co-Authors: A. Arun, M. Gowdhamamoorthi, S. Kiruthika, B. MuthukumaranAbstract:This paper presents the development of a novel liquid -based microscale fuel cell u sing Sodium Percarbonate in alkaline medium that utilizes the occurrence of laminar flows in an E -shaped microchannel to keep the separation of fuel and oxidant streams without turbulent mixing. The liquid fuel and oxidant streams enter the system at diffe rent inlets, and then merge and flow in parallel to one another through the channel between two electrodes without the need of a membrane to separate both streams. Thus developed fuel cell is based on a membraneless structure. In this membraneless fuel cel l, methanol and Sodium Percarbonate were used as a fuel at anode and an oxidant at cathode respectively. Operating a fuel cell under alkaline conditions has positive effects on the reaction kinetics, both at the anode and cathode, while the cell performanc e 'mixed- media' conditions offers an opportunity to increase the maximum achievable open cell potential (OCP). With a fuel mixture flow rate of 1 00 µl min -1 , a maximum output power density of 26.76 mW cm -2 was achieved. The
Jacques Muzart - One of the best experts on this subject based on the ideXlab platform.
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Use of Benzotrifluoride as Solvent for Chromium-catalysed Oxidations with Sodium Percarbonate
Journal of Chemical Research, 1999Co-Authors: Nicolas Delaval, Sandrine Bouquillon, Françoise Hénin, Jacques MuzartAbstract:Chromium(VI)-catalysed oxidations of alcohols and benzylic methylene groups by Sodium Percarbonate have been carried out in refluxing benzotrifluoride; comparisons with previous studies showed that this solvent is a valuable alternative to 1,2-dichloroethane for such reactions.
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Molybdenyl acetylacetonate-assisted oxidation of α-functionalized alcohols by Sodium Percarbonate, influence of the reaction temperature
Journal of Molecular Catalysis A: Chemical, 1998Co-Authors: Abdelkalek Riahi, Samia Aït-mohand, Stéphane Maignien, Jacques MuzartAbstract:Abstract In acetonitrile, the course and the efficiency of the oxidation by Sodium Percarbonate of benzylic alcohols, α -substituted by a keto, hydroxy, ester or an acid group and of 2-hydroxycyclohexanone is often largely influenced by the reaction temperature and the presence of catalytic amounts of MoO 2 (acac) 2 .
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Chlorides and Acetylacetonates of Transition Metals as Catalysts for the Oxidation of 1‐Indanol by Sodium Percarbonate
Chemische Berichte, 1997Co-Authors: Samia Aït-mohand, Jacques Muzart, Stanislav LunakAbstract:The screening of metal chlorides and metal acetylacetonates as catalysts for the oxidation of 1-indanol by Sodium Percarbonate (at reflux in 1,2-dichloroethane in the presence of small amounts of Adogen 464) has been carried out. The efficiency of the process depended on the nature of the transition metal and its oxidation state but, except for iron, was not greatly influenced by the nature of the ligands. Good conversions and yields have been obtained using PdCl2, RhCl3, RuCl3 and, particularly, MoO2(acac)2 as catalysts.
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Chromium-mediated benzylic oxidations by Sodium Percarbonate in the presence of a phase transfer catalyst
Tetrahedron Letters, 1995Co-Authors: Jacques Muzart, Samia Aït-mohandAbstract:In the presence of catalytic amounts of (n-Bu3SnO)2CrO2, Adogen 464 and p-toluenesulfonic acid, benzylic methylene groups are effectively oxidized into alcohols and ketones by Sodium Percarbonate in refluxing acetonitrile.
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Oxidation of Alcohols by Sodium Percarbonate Catalyzed by the Association of Potassium Dichromate and a Phase Transfer Agent
Synthetic Communications, 1995Co-Authors: Samia Aït Mohand, Jacques MuzartAbstract:Abstract Catalytic amounts of both potassium dichromate and Adogen 464 are effective in promoting the oxidation by Sodium Percarbonate of various unsaturated primary and secondary alcohols to the corresponding carbonyl compounds at 80°C in 1,2-dichloroethane, the reaction of saturated alcohols being sluggish.
Arash Ghorbani-choghamarani - One of the best experts on this subject based on the ideXlab platform.
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Catalytic oxidation of sulfides to sulfoxides using Sodium perborate and/or Sodium Percarbonate and silica sulfuric acid in the presence of KBr
Catalysis Communications, 2009Co-Authors: Davood Habibi, Mohammad Ali Zolfigol, Malihe Safaiee, Atefeh Shamsian, Arash Ghorbani-choghamaraniAbstract:Chemoselective catalytic oxidation of sulfides has been developed. A variety of aliphatic and aromatic sulfides are subjected to the sulfoxidation reaction by treatment of Sodium perborate (SPB) and/or Sodium Percarbonate (SPC), silica sulfuric acid (SSA) and catalytic amounts of KBr in the presence of wet SiO2 (50% w/w) in dichloromethane at room temperature with moderate to good yields.
