The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Yong-kook Choi - One of the best experts on this subject based on the ideXlab platform.
-
Electrocatalytic effects of Thionyl Chloride reduction by polymeric Schiff base transition metal(II) complexes
Applied Catalysis A: General, 2003Co-Authors: Woo-seong Kim, Yong-kook ChoiAbstract:Abstract Electrocatalytic effects for the reduction of Thionyl Chloride in LiAlCl 4 /SOCl 2 electrolyte solution containing polymeric Schiff base M(II) (M: Ni and Cu) complexes were evaluated by determining kinetic parameters with cyclic voltammetry at a glassy carbon electrode. The charge transfer process during the reduction of Thionyl Chloride was affected by the concentration of the catalyst. The catalytic effects were demonstrated from both a shift of the reduction potential for the Thionyl Chloride in a more positive direction and an increase in peak currents. The reduction of Thionyl Chloride was found to be diffusion-controlled. Catalytic effects are larger in Thionyl Chloride solutions containing (PVPS)M(II)(SALPR) rather than in those containing (PVPS)M(II)(SALPE). Such results are opposite to those for monomeric Schiff base complexes. Significant improvements in the cell performance were found in terms of both thermodynamics and kinetic parameters for the Thionyl Chloride reduction. An exchange rate constant, k o , of 1.62×10 −8 cm/s was found at a bare electrode, while larger values of (4.69–8.18)×10 −8 cm/s were observed at the catalyst-supported glassy carbon electrode.
-
Studies on electrochemical properties of Thionyl Chloride reduction by Schiff base metal(II) complexes
Journal of Power Sources, 2002Co-Authors: Woo-seong Kim, Woo-jong Sim, Kwang-il Chung, Yung-eun Sung, Yong-kook ChoiAbstract:Abstract Electrocatalytic effects associated with the reduction of Thionyl Chloride in a LiAlCl 4 –SOCl 2 electrolyte solution containing Schiff base metal(II) (metal (M): Co, Ni, Cu and Mn) complexes are evaluated by determining the kinetic parameters for the reactions using cyclic voltammetry at a glassy carbon electrode. The charge-transfer process during the reduction of Thionyl Chloride is affected by the concentration of the catalyst. Catalytic effects are demonstrated from both a shift in the reduction potential for the Thionyl Chloride in a more positive direction and an increase in peak currents. The reduction of Thionyl Chloride is diffusion controlled. Catalytic effects are larger for Thionyl Chloride solutions containing M(II)(1,5-bis(salicylidene imino) pentane) (M(II)(SALPE)) rather than M(II)(1,3-bis(salicylidene imino) propane) (M(II)(SALPR)). Significant improvements in cell performance are found in terms of the both thermodynamics and kinetic parameters for the Thionyl Chloride reduction. An exchange rate constant, k 0 , of 1.89×10 −8 cm s −1 is found at the bare electrode, while larger values of 2.79×10 −8 to 2.09×10 −6 cm s −1 are observed in the case of the catalyst-supported glassy carbon electrode.
-
Catalytic effect of transition metal(II)-N,N′-bis(naphthaldehyde)diimines on reduction of Thionyl Chloride
Microchemical Journal, 2000Co-Authors: Yong-kook Choi, Woo-seong Kim, Kwang-il Chung, Myoung-woo Chung, Hyoung-pyo NamAbstract:Abstract A series of transition metal(II) complexes, such as 1,2-bis(naphthylideneimino)ethane [M(II)(NAPET)], 1,3-bis(naphthylideneimino)propane [M(II)(NAPPR)], 1,4-bis(naphthylideneimino)butane [M(II)(NAPBU)] and 1,5-bis(naphthylideneimino)pentane [M(II)(NAPPE)] (M=Co, Cu, Ni), are synthesized. Catalytic effects of these complexes for the reduction of Thionyl Chloride on a glassy carbon electrode are evaluated by determining kinetic parameters with cyclic voltammetry. The charge transfer process during the reduction of Thionyl Chloride is affected by the concentration of catalysts. Some tetradentate Schiff base M(II) complexes show catalytic activities for the reduction of Thionyl Chloride. The catalytic effects are demonstrated from a shift of the reduction potential for Thionyl Chloride towards a more positive direction and an increase in peak current. Significant improvements in the cell performance have been noted in terms of both thermodynamic and kinetic parameters for the Thionyl Chloride reduction. An exchange rate constant, k o , of 1.24×10 −8 cm/s was observed at a bare electrode, while larger values of 0.23–1.69×10 −7 cm/s were observed at the catalyst-supported glassy carbon electrode. Thermodynamic and kinetic parameters for Thionyl Chloride reduction are affected by the chelate ring size of ligands in the metal(II)–Schiff base complexes used as a catalyst.
-
Electrocatalytic Effects for the Reduction of Thionyl Chloride in $Li/SOCl_2$ Cell Containing Schiff Base Metal(II) Complexes
Bulletin of The Korean Chemical Society, 2000Co-Authors: Woo-seong Kim, Kwang-il Chung, Yung-eun Sung, Shin-kook Kim, Seungwon Jeon, Yeonhee Kim, Yong-kook ChoiAbstract:Electrocatalytic effects for the reduction of Thionyl Chloride in electrolyte solution containing Schiff base M(II) (M; Co and Fe) complexes are evaluated by determining kinetic parameters with cyclic voltammetry and chronoamperometry at a glassy carbon electrode. The charge transfer process during the reduction of Thionyl Chloride is affected by the concentration of the catalyst. The catalytic effects are demonstrated from both a shift of the reduction potential for the Thionyl Chloride toward a more positive direction and an increase in peak currents. Catalytic effects are larger in Thionyl Chloride solutions containing the binuclear [M(II) (TSBP)] complex rather than mononuclear [M(II)(BSDT)] complexes. Significant improvements in the cell performance have been noted in terms of both thermodynamics and activation energy for the Thionyl Chloride reduction. The activation energy calculated from the Arrhenius plots is 4.5-5.9 kcal/mole at bare glassy carbon electrodes. The activation energy calculated for the catalyst containing solution is 3.3-4.9 kcalmole, depending on whether the temperature is lowered or rasied.
Woo-seong Kim - One of the best experts on this subject based on the ideXlab platform.
-
Electrocatalytic effects of Thionyl Chloride reduction by polymeric Schiff base transition metal(II) complexes
Applied Catalysis A: General, 2003Co-Authors: Woo-seong Kim, Yong-kook ChoiAbstract:Abstract Electrocatalytic effects for the reduction of Thionyl Chloride in LiAlCl 4 /SOCl 2 electrolyte solution containing polymeric Schiff base M(II) (M: Ni and Cu) complexes were evaluated by determining kinetic parameters with cyclic voltammetry at a glassy carbon electrode. The charge transfer process during the reduction of Thionyl Chloride was affected by the concentration of the catalyst. The catalytic effects were demonstrated from both a shift of the reduction potential for the Thionyl Chloride in a more positive direction and an increase in peak currents. The reduction of Thionyl Chloride was found to be diffusion-controlled. Catalytic effects are larger in Thionyl Chloride solutions containing (PVPS)M(II)(SALPR) rather than in those containing (PVPS)M(II)(SALPE). Such results are opposite to those for monomeric Schiff base complexes. Significant improvements in the cell performance were found in terms of both thermodynamics and kinetic parameters for the Thionyl Chloride reduction. An exchange rate constant, k o , of 1.62×10 −8 cm/s was found at a bare electrode, while larger values of (4.69–8.18)×10 −8 cm/s were observed at the catalyst-supported glassy carbon electrode.
-
Studies on electrochemical properties of Thionyl Chloride reduction by Schiff base metal(II) complexes
Journal of Power Sources, 2002Co-Authors: Woo-seong Kim, Woo-jong Sim, Kwang-il Chung, Yung-eun Sung, Yong-kook ChoiAbstract:Abstract Electrocatalytic effects associated with the reduction of Thionyl Chloride in a LiAlCl 4 –SOCl 2 electrolyte solution containing Schiff base metal(II) (metal (M): Co, Ni, Cu and Mn) complexes are evaluated by determining the kinetic parameters for the reactions using cyclic voltammetry at a glassy carbon electrode. The charge-transfer process during the reduction of Thionyl Chloride is affected by the concentration of the catalyst. Catalytic effects are demonstrated from both a shift in the reduction potential for the Thionyl Chloride in a more positive direction and an increase in peak currents. The reduction of Thionyl Chloride is diffusion controlled. Catalytic effects are larger for Thionyl Chloride solutions containing M(II)(1,5-bis(salicylidene imino) pentane) (M(II)(SALPE)) rather than M(II)(1,3-bis(salicylidene imino) propane) (M(II)(SALPR)). Significant improvements in cell performance are found in terms of the both thermodynamics and kinetic parameters for the Thionyl Chloride reduction. An exchange rate constant, k 0 , of 1.89×10 −8 cm s −1 is found at the bare electrode, while larger values of 2.79×10 −8 to 2.09×10 −6 cm s −1 are observed in the case of the catalyst-supported glassy carbon electrode.
-
Catalytic effect of transition metal(II)-N,N′-bis(naphthaldehyde)diimines on reduction of Thionyl Chloride
Microchemical Journal, 2000Co-Authors: Yong-kook Choi, Woo-seong Kim, Kwang-il Chung, Myoung-woo Chung, Hyoung-pyo NamAbstract:Abstract A series of transition metal(II) complexes, such as 1,2-bis(naphthylideneimino)ethane [M(II)(NAPET)], 1,3-bis(naphthylideneimino)propane [M(II)(NAPPR)], 1,4-bis(naphthylideneimino)butane [M(II)(NAPBU)] and 1,5-bis(naphthylideneimino)pentane [M(II)(NAPPE)] (M=Co, Cu, Ni), are synthesized. Catalytic effects of these complexes for the reduction of Thionyl Chloride on a glassy carbon electrode are evaluated by determining kinetic parameters with cyclic voltammetry. The charge transfer process during the reduction of Thionyl Chloride is affected by the concentration of catalysts. Some tetradentate Schiff base M(II) complexes show catalytic activities for the reduction of Thionyl Chloride. The catalytic effects are demonstrated from a shift of the reduction potential for Thionyl Chloride towards a more positive direction and an increase in peak current. Significant improvements in the cell performance have been noted in terms of both thermodynamic and kinetic parameters for the Thionyl Chloride reduction. An exchange rate constant, k o , of 1.24×10 −8 cm/s was observed at a bare electrode, while larger values of 0.23–1.69×10 −7 cm/s were observed at the catalyst-supported glassy carbon electrode. Thermodynamic and kinetic parameters for Thionyl Chloride reduction are affected by the chelate ring size of ligands in the metal(II)–Schiff base complexes used as a catalyst.
-
Electrocatalytic Effects for the Reduction of Thionyl Chloride in $Li/SOCl_2$ Cell Containing Schiff Base Metal(II) Complexes
Bulletin of The Korean Chemical Society, 2000Co-Authors: Woo-seong Kim, Kwang-il Chung, Yung-eun Sung, Shin-kook Kim, Seungwon Jeon, Yeonhee Kim, Yong-kook ChoiAbstract:Electrocatalytic effects for the reduction of Thionyl Chloride in electrolyte solution containing Schiff base M(II) (M; Co and Fe) complexes are evaluated by determining kinetic parameters with cyclic voltammetry and chronoamperometry at a glassy carbon electrode. The charge transfer process during the reduction of Thionyl Chloride is affected by the concentration of the catalyst. The catalytic effects are demonstrated from both a shift of the reduction potential for the Thionyl Chloride toward a more positive direction and an increase in peak currents. Catalytic effects are larger in Thionyl Chloride solutions containing the binuclear [M(II) (TSBP)] complex rather than mononuclear [M(II)(BSDT)] complexes. Significant improvements in the cell performance have been noted in terms of both thermodynamics and activation energy for the Thionyl Chloride reduction. The activation energy calculated from the Arrhenius plots is 4.5-5.9 kcal/mole at bare glassy carbon electrodes. The activation energy calculated for the catalyst containing solution is 3.3-4.9 kcalmole, depending on whether the temperature is lowered or rasied.
J. Robert Durrwachter - One of the best experts on this subject based on the ideXlab platform.
-
Neutralization of a Toluene Waste Stream Containing Thionyl Chloride
Organic Process Research & Development, 2017Co-Authors: J. Robert DurrwachterAbstract:Neutralization of Thionyl Chloride in toluene was found to be ineffective with water. A solution is to use an excess of a soluble reagent to consume the Thionyl Chloride. Butanol was shown to convert Thionyl Chloride to n-butyl sulfite and hydrogen Chloride. An aqueous workup removes any residual hydrogen Chloride.
Robin D. Rogers - One of the best experts on this subject based on the ideXlab platform.
-
Condensed thiophenes and selenophenes: Thionyl Chloride and selenium oxyChloride as sulfur and selenium transfer reagents.
The Journal of organic chemistry, 2002Co-Authors: Ramiya R. Amaresh, M. V. Lakshmikantham, Jeffrey W. Baldwin, Michael P. Cava, Robert M. Metzger, Robin D. RogersAbstract:3,4-Cyanomethyl substituted thiophenes reacted with Thionyl Chloride in the presence of base to give dicyano substituted thieno(3,4-c)thiophenes. The use of selenium oxyChloride furnished the corresponding cyano substituted seleno(3,4-c)thiophene. 1,2-Phenylenediacetonitriles gave the corresponding cyano substituted benzo(c)thiophenes and benzo(c)selenenophenes, respectively, upon reaction with Thionyl Chloride and selenium oxyChloride in the presence of base.
Kwang-il Chung - One of the best experts on this subject based on the ideXlab platform.
-
Studies on electrochemical properties of Thionyl Chloride reduction by Schiff base metal(II) complexes
Journal of Power Sources, 2002Co-Authors: Woo-seong Kim, Woo-jong Sim, Kwang-il Chung, Yung-eun Sung, Yong-kook ChoiAbstract:Abstract Electrocatalytic effects associated with the reduction of Thionyl Chloride in a LiAlCl 4 –SOCl 2 electrolyte solution containing Schiff base metal(II) (metal (M): Co, Ni, Cu and Mn) complexes are evaluated by determining the kinetic parameters for the reactions using cyclic voltammetry at a glassy carbon electrode. The charge-transfer process during the reduction of Thionyl Chloride is affected by the concentration of the catalyst. Catalytic effects are demonstrated from both a shift in the reduction potential for the Thionyl Chloride in a more positive direction and an increase in peak currents. The reduction of Thionyl Chloride is diffusion controlled. Catalytic effects are larger for Thionyl Chloride solutions containing M(II)(1,5-bis(salicylidene imino) pentane) (M(II)(SALPE)) rather than M(II)(1,3-bis(salicylidene imino) propane) (M(II)(SALPR)). Significant improvements in cell performance are found in terms of the both thermodynamics and kinetic parameters for the Thionyl Chloride reduction. An exchange rate constant, k 0 , of 1.89×10 −8 cm s −1 is found at the bare electrode, while larger values of 2.79×10 −8 to 2.09×10 −6 cm s −1 are observed in the case of the catalyst-supported glassy carbon electrode.
-
Catalytic effect of transition metal(II)-N,N′-bis(naphthaldehyde)diimines on reduction of Thionyl Chloride
Microchemical Journal, 2000Co-Authors: Yong-kook Choi, Woo-seong Kim, Kwang-il Chung, Myoung-woo Chung, Hyoung-pyo NamAbstract:Abstract A series of transition metal(II) complexes, such as 1,2-bis(naphthylideneimino)ethane [M(II)(NAPET)], 1,3-bis(naphthylideneimino)propane [M(II)(NAPPR)], 1,4-bis(naphthylideneimino)butane [M(II)(NAPBU)] and 1,5-bis(naphthylideneimino)pentane [M(II)(NAPPE)] (M=Co, Cu, Ni), are synthesized. Catalytic effects of these complexes for the reduction of Thionyl Chloride on a glassy carbon electrode are evaluated by determining kinetic parameters with cyclic voltammetry. The charge transfer process during the reduction of Thionyl Chloride is affected by the concentration of catalysts. Some tetradentate Schiff base M(II) complexes show catalytic activities for the reduction of Thionyl Chloride. The catalytic effects are demonstrated from a shift of the reduction potential for Thionyl Chloride towards a more positive direction and an increase in peak current. Significant improvements in the cell performance have been noted in terms of both thermodynamic and kinetic parameters for the Thionyl Chloride reduction. An exchange rate constant, k o , of 1.24×10 −8 cm/s was observed at a bare electrode, while larger values of 0.23–1.69×10 −7 cm/s were observed at the catalyst-supported glassy carbon electrode. Thermodynamic and kinetic parameters for Thionyl Chloride reduction are affected by the chelate ring size of ligands in the metal(II)–Schiff base complexes used as a catalyst.
-
Electrocatalytic Effects for the Reduction of Thionyl Chloride in $Li/SOCl_2$ Cell Containing Schiff Base Metal(II) Complexes
Bulletin of The Korean Chemical Society, 2000Co-Authors: Woo-seong Kim, Kwang-il Chung, Yung-eun Sung, Shin-kook Kim, Seungwon Jeon, Yeonhee Kim, Yong-kook ChoiAbstract:Electrocatalytic effects for the reduction of Thionyl Chloride in electrolyte solution containing Schiff base M(II) (M; Co and Fe) complexes are evaluated by determining kinetic parameters with cyclic voltammetry and chronoamperometry at a glassy carbon electrode. The charge transfer process during the reduction of Thionyl Chloride is affected by the concentration of the catalyst. The catalytic effects are demonstrated from both a shift of the reduction potential for the Thionyl Chloride toward a more positive direction and an increase in peak currents. Catalytic effects are larger in Thionyl Chloride solutions containing the binuclear [M(II) (TSBP)] complex rather than mononuclear [M(II)(BSDT)] complexes. Significant improvements in the cell performance have been noted in terms of both thermodynamics and activation energy for the Thionyl Chloride reduction. The activation energy calculated from the Arrhenius plots is 4.5-5.9 kcal/mole at bare glassy carbon electrodes. The activation energy calculated for the catalyst containing solution is 3.3-4.9 kcalmole, depending on whether the temperature is lowered or rasied.
