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Kazushi Arata - One of the best experts on this subject based on the ideXlab platform.
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isomerization of cycloheptane Cyclooctane and cyclodecane catalyzed by sulfated zirconia comparison with open chain alkanes
Physical Chemistry Chemical Physics, 2003Co-Authors: Daishi Satoh, Hiromi Matsuhashi, Hideo Nakamura, Kazushi ArataAbstract:The skeletal isomerization of cycloalkanes with the number of carbons greater than six, cycloheptane, Cyclooctane, cyclodecane, and cyclododecane, was performed over sulfated zirconia in liquid phase at 50°C. A main product of methylcyclohexane was formed from cycloheptane via a protonated cyclopropane intermediate, protonated [4.1.0]bicycloheptane, together with small amounts of trans-1,2-dimethylcyclopentane, cis- and trans-1,3-dimethylcyclopentanes, 1,1-dimethylcyclopentane, and ethylcyclopentane. A major product from Cyclooctane was ethylcyclohexane via a protonated cyclobutane intermediate, protonated [4.2.0]biCyclooctane, followed by cis-1,3-dimethylcyclohexane in addition to small amounts of trans-1,2-, -1,3-, -1,4-dimethylcyclohexanes, 1,1-dimethylcyclohexane, and methylcycloheptane. The detailed reaction-paths for cycloheptane and Cyclooctane were shown after additional examinations in reactions of methylcyclohexane, ethylcyclopentane, ethylcyclohexane, and 1,2-dimethylcyclohexane. Cyclodecane was dehydrogenated into cis- or trans-decaline with the evolution of a dihydrogen. Cyclododecane was converted into lots of products, more than 30 species.
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Isomerizations of Cycloheptane to Methylcyclohexane and Cyclooctane to Ethylcyclohexane Catalyzed by Sulfated Zirconia
Catalysis Letters, 2003Co-Authors: Daishi Satoh, Hiromi Matsuhashi, Hideo Nakamura, Kazushi ArataAbstract:Reactions of cycloheptane and Cyclooctane were performed over the superacid of sulfated zirconia in liquid phase at 50 °C a main product was methylcyclohexane from cycloheptane through a protonated bicyclo[4.1.0]heptane and ethylcyclohexane from Cyclooctane via a protonated bicyclo[4.2.0]octane. Cyclodecane was dehydrogenated into decalines; cyclododecane was converted into many products, more than 30 species.
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Isomerization of cycloheptane, Cyclooctane, and cyclodecane catalyzed by sulfated zirconia—comparison with open-chain alkanes
Phys. Chem. Chem. Phys., 2003Co-Authors: Daishi Satoh, Hiromi Matsuhashi, Hideo Nakamura, Kazushi ArataAbstract:The skeletal isomerization of cycloalkanes with the number of carbons greater than six, cycloheptane, Cyclooctane, cyclodecane, and cyclododecane, was performed over sulfated zirconia in liquid phase at 50°C. A main product of methylcyclohexane was formed from cycloheptane via a protonated cyclopropane intermediate, protonated [4.1.0]bicycloheptane, together with small amounts of trans-1,2-dimethylcyclopentane, cis- and trans-1,3-dimethylcyclopentanes, 1,1-dimethylcyclopentane, and ethylcyclopentane. A major product from Cyclooctane was ethylcyclohexane via a protonated cyclobutane intermediate, protonated [4.2.0]biCyclooctane, followed by cis-1,3-dimethylcyclohexane in addition to small amounts of trans-1,2-, -1,3-, -1,4-dimethylcyclohexanes, 1,1-dimethylcyclohexane, and methylcycloheptane. The detailed reaction-paths for cycloheptane and Cyclooctane were shown after additional examinations in reactions of methylcyclohexane, ethylcyclopentane, ethylcyclohexane, and 1,2-dimethylcyclohexane. Cyclodecane was dehydrogenated into cis- or trans-decaline with the evolution of a dihydrogen. Cyclododecane was converted into lots of products, more than 30 species.
Ángeles Domínguez - One of the best experts on this subject based on the ideXlab platform.
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measurement and correlation of liquid liquid equilibria for ternary systems Cyclooctane aromatic hydrocarbon 1 ethyl 3 methylpyridinium ethylsulfate at t 298 15 k and atmospheric pressure
Fluid Phase Equilibria, 2010Co-Authors: Emilio J. González, Noelia Calvar, Begoña González, Ángeles DomínguezAbstract:Abstract This work reports liquid–liquid equilibrium (LLE) results for the ternary systems {Cyclooctane + benzene + 1-ethyl-3-methylpyridinium ethylsulfate}, {Cyclooctane + toluene + 1-ethyl-3-methylpyridinium ethylsulfate}, and {Cyclooctane + ethylbenzene + 1-ethyl-3-methylpyridinium ethylsulfate} at T = 298.15 K and under atmospheric pressure. The selectivity, percent removal of aromatic, and distribution coefficient ratio, derived from the tie-line data, were calculated to determine if this ionic liquid is a good solvent for the extraction of aromatics from Cyclooctane. The phase diagrams for the ternary systems are shown, and the tie-lines correlated with the NRTL model have been compared with the experimental data. The consistency of the experimental LLE data was ascertained using the Othmer–Tobias and Hand equations. No data for mixtures presented here have been found in the literature.
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Measurement and correlation of liquid–liquid equilibria for ternary systems {Cyclooctane + aromatic hydrocarbon + 1-ethyl-3-methylpyridinium ethylsulfate} at T = 298.15 K and atmospheric pressure
Fluid Phase Equilibria, 2010Co-Authors: Emilio J. González, Noelia Calvar, Begoña González, Ángeles DomínguezAbstract:Abstract This work reports liquid–liquid equilibrium (LLE) results for the ternary systems {Cyclooctane + benzene + 1-ethyl-3-methylpyridinium ethylsulfate}, {Cyclooctane + toluene + 1-ethyl-3-methylpyridinium ethylsulfate}, and {Cyclooctane + ethylbenzene + 1-ethyl-3-methylpyridinium ethylsulfate} at T = 298.15 K and under atmospheric pressure. The selectivity, percent removal of aromatic, and distribution coefficient ratio, derived from the tie-line data, were calculated to determine if this ionic liquid is a good solvent for the extraction of aromatics from Cyclooctane. The phase diagrams for the ternary systems are shown, and the tie-lines correlated with the NRTL model have been compared with the experimental data. The consistency of the experimental LLE data was ascertained using the Othmer–Tobias and Hand equations. No data for mixtures presented here have been found in the literature.
N. A. Pitchford - One of the best experts on this subject based on the ideXlab platform.
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Symmetry‐modified conformational mapping and classification of the medium rings from crystallographic data. IV. Cyclooctane and related eight‐membered rings
Acta Crystallographica Section B Structural Science, 1996Co-Authors: Frank H. Allen, Judith A. K. Howard, N. A. PitchfordAbstract:Crystallographic observations of eight-membered ring conformations, retrieved from the Cambridge Structural Database, have been mapped and classified using symmetry-adapted deformation coordinates, principal component analysis and cluster analysis. Seven subsets of eight-membered rings, containing 11–32 conformational observations, have been analysed: Cyclooctane (dataset 8C1), cyclooctene (8C2), cycloocta-1,3-diene (8C3), mono-exo-unsaturated carbocycles (8C4), monohetero (8A1), 1,5-dihetero (8A2) and 1,3,5,7-tetrahetero rings (8A3). The energetically preferred (by ~7 kJ mol−1) boat-chair form is adopted by 26 of the 32 examples of 8C1, although varying degrees of twist are induced by fusion to rings of sizes three, four and five. Crystallographic results for other subsets also populate the lower-energy areas of the appropriate potential energy hypersurface, but the analyses are complicated by the effects of ring fusion and by the small numbers of relevant crystal structures in some cases.
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symmetry modified conformational mapping and classification of the medium rings from crystallographic data iv Cyclooctane and related eight membered rings
Acta Crystallographica Section B-structural Science, 1996Co-Authors: Frank H. Allen, Judith A. K. Howard, N. A. PitchfordAbstract:Crystallographic observations of eight-membered ring conformations, retrieved from the Cambridge Structural Database, have been mapped and classified using symmetry-adapted deformation coordinates, principal component analysis and cluster analysis. Seven subsets of eight-membered rings, containing 11–32 conformational observations, have been analysed: Cyclooctane (dataset 8C1), cyclooctene (8C2), cycloocta-1,3-diene (8C3), mono-exo-unsaturated carbocycles (8C4), monohetero (8A1), 1,5-dihetero (8A2) and 1,3,5,7-tetrahetero rings (8A3). The energetically preferred (by ~7 kJ mol−1) boat-chair form is adopted by 26 of the 32 examples of 8C1, although varying degrees of twist are induced by fusion to rings of sizes three, four and five. Crystallographic results for other subsets also populate the lower-energy areas of the appropriate potential energy hypersurface, but the analyses are complicated by the effects of ring fusion and by the small numbers of relevant crystal structures in some cases.
Daishi Satoh - One of the best experts on this subject based on the ideXlab platform.
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isomerization of cycloheptane Cyclooctane and cyclodecane catalyzed by sulfated zirconia comparison with open chain alkanes
Physical Chemistry Chemical Physics, 2003Co-Authors: Daishi Satoh, Hiromi Matsuhashi, Hideo Nakamura, Kazushi ArataAbstract:The skeletal isomerization of cycloalkanes with the number of carbons greater than six, cycloheptane, Cyclooctane, cyclodecane, and cyclododecane, was performed over sulfated zirconia in liquid phase at 50°C. A main product of methylcyclohexane was formed from cycloheptane via a protonated cyclopropane intermediate, protonated [4.1.0]bicycloheptane, together with small amounts of trans-1,2-dimethylcyclopentane, cis- and trans-1,3-dimethylcyclopentanes, 1,1-dimethylcyclopentane, and ethylcyclopentane. A major product from Cyclooctane was ethylcyclohexane via a protonated cyclobutane intermediate, protonated [4.2.0]biCyclooctane, followed by cis-1,3-dimethylcyclohexane in addition to small amounts of trans-1,2-, -1,3-, -1,4-dimethylcyclohexanes, 1,1-dimethylcyclohexane, and methylcycloheptane. The detailed reaction-paths for cycloheptane and Cyclooctane were shown after additional examinations in reactions of methylcyclohexane, ethylcyclopentane, ethylcyclohexane, and 1,2-dimethylcyclohexane. Cyclodecane was dehydrogenated into cis- or trans-decaline with the evolution of a dihydrogen. Cyclododecane was converted into lots of products, more than 30 species.
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Isomerizations of Cycloheptane to Methylcyclohexane and Cyclooctane to Ethylcyclohexane Catalyzed by Sulfated Zirconia
Catalysis Letters, 2003Co-Authors: Daishi Satoh, Hiromi Matsuhashi, Hideo Nakamura, Kazushi ArataAbstract:Reactions of cycloheptane and Cyclooctane were performed over the superacid of sulfated zirconia in liquid phase at 50 °C a main product was methylcyclohexane from cycloheptane through a protonated bicyclo[4.1.0]heptane and ethylcyclohexane from Cyclooctane via a protonated bicyclo[4.2.0]octane. Cyclodecane was dehydrogenated into decalines; cyclododecane was converted into many products, more than 30 species.
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Isomerization of cycloheptane, Cyclooctane, and cyclodecane catalyzed by sulfated zirconia—comparison with open-chain alkanes
Phys. Chem. Chem. Phys., 2003Co-Authors: Daishi Satoh, Hiromi Matsuhashi, Hideo Nakamura, Kazushi ArataAbstract:The skeletal isomerization of cycloalkanes with the number of carbons greater than six, cycloheptane, Cyclooctane, cyclodecane, and cyclododecane, was performed over sulfated zirconia in liquid phase at 50°C. A main product of methylcyclohexane was formed from cycloheptane via a protonated cyclopropane intermediate, protonated [4.1.0]bicycloheptane, together with small amounts of trans-1,2-dimethylcyclopentane, cis- and trans-1,3-dimethylcyclopentanes, 1,1-dimethylcyclopentane, and ethylcyclopentane. A major product from Cyclooctane was ethylcyclohexane via a protonated cyclobutane intermediate, protonated [4.2.0]biCyclooctane, followed by cis-1,3-dimethylcyclohexane in addition to small amounts of trans-1,2-, -1,3-, -1,4-dimethylcyclohexanes, 1,1-dimethylcyclohexane, and methylcycloheptane. The detailed reaction-paths for cycloheptane and Cyclooctane were shown after additional examinations in reactions of methylcyclohexane, ethylcyclopentane, ethylcyclohexane, and 1,2-dimethylcyclohexane. Cyclodecane was dehydrogenated into cis- or trans-decaline with the evolution of a dihydrogen. Cyclododecane was converted into lots of products, more than 30 species.
Emilio J. González - One of the best experts on this subject based on the ideXlab platform.
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measurement and correlation of liquid liquid equilibria for ternary systems Cyclooctane aromatic hydrocarbon 1 ethyl 3 methylpyridinium ethylsulfate at t 298 15 k and atmospheric pressure
Fluid Phase Equilibria, 2010Co-Authors: Emilio J. González, Noelia Calvar, Begoña González, Ángeles DomínguezAbstract:Abstract This work reports liquid–liquid equilibrium (LLE) results for the ternary systems {Cyclooctane + benzene + 1-ethyl-3-methylpyridinium ethylsulfate}, {Cyclooctane + toluene + 1-ethyl-3-methylpyridinium ethylsulfate}, and {Cyclooctane + ethylbenzene + 1-ethyl-3-methylpyridinium ethylsulfate} at T = 298.15 K and under atmospheric pressure. The selectivity, percent removal of aromatic, and distribution coefficient ratio, derived from the tie-line data, were calculated to determine if this ionic liquid is a good solvent for the extraction of aromatics from Cyclooctane. The phase diagrams for the ternary systems are shown, and the tie-lines correlated with the NRTL model have been compared with the experimental data. The consistency of the experimental LLE data was ascertained using the Othmer–Tobias and Hand equations. No data for mixtures presented here have been found in the literature.
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Measurement and correlation of liquid–liquid equilibria for ternary systems {Cyclooctane + aromatic hydrocarbon + 1-ethyl-3-methylpyridinium ethylsulfate} at T = 298.15 K and atmospheric pressure
Fluid Phase Equilibria, 2010Co-Authors: Emilio J. González, Noelia Calvar, Begoña González, Ángeles DomínguezAbstract:Abstract This work reports liquid–liquid equilibrium (LLE) results for the ternary systems {Cyclooctane + benzene + 1-ethyl-3-methylpyridinium ethylsulfate}, {Cyclooctane + toluene + 1-ethyl-3-methylpyridinium ethylsulfate}, and {Cyclooctane + ethylbenzene + 1-ethyl-3-methylpyridinium ethylsulfate} at T = 298.15 K and under atmospheric pressure. The selectivity, percent removal of aromatic, and distribution coefficient ratio, derived from the tie-line data, were calculated to determine if this ionic liquid is a good solvent for the extraction of aromatics from Cyclooctane. The phase diagrams for the ternary systems are shown, and the tie-lines correlated with the NRTL model have been compared with the experimental data. The consistency of the experimental LLE data was ascertained using the Othmer–Tobias and Hand equations. No data for mixtures presented here have been found in the literature.
