The Experts below are selected from a list of 3810 Experts worldwide ranked by ideXlab platform
Chiehming J Chang - One of the best experts on this subject based on the ideXlab platform.
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vapor liquid equilibria and density measurement for binary mixtures of benzene nonane methylbenzene 1 2 dimethylbenzene 1 3 dimethylbenzene 2 3 4 5 Tetrahydrothiophene 1 1 dioxide sulfolane 1 2 dimethylbenzene sulfolane 1 2 dimethylbenzene n methylfo
Journal of Chemical & Engineering Data, 2010Co-Authors: Weikuan Chen, Chiehming J ChangAbstract:Vapor−liquid equilibria at (333.15, 343.15, and 353.15) K for seven binary mixtures of benzene + nonane, methylbenzene + 1,2-dimethylbenzene, 1,3-dimethylbenzene + 2,3,4,5-Tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + 2,3,4,5-Tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + N-methylformamide (NMF), 1,3-dimethylbenzene + NMF, and 1,4-dimethylbenzene + NMF have been obtained at pressures ranging from (0.01 to 101.3) kPa. The Wilson, nonrandom two-liquid (NRTL), and universal quasichemical (UNIQUAC) activity coefficient models have been employed to correlate experimental data to find intermolecular parameters. The nonideal behavior of the vapor phase has been considered by using the Peng−Robinson equation of state in calculating the vapor mole fraction. Liquid and vapor densities were measured by using two vibrating tube densitometers to determine liquid excess molar volumes. Six systems of benzene + nonane, 1,3-dimethylbenzene + 2,3,4,5-Tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + 2...
Weikuan Chen - One of the best experts on this subject based on the ideXlab platform.
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vapor liquid equilibria and density measurement for binary mixtures of benzene nonane methylbenzene 1 2 dimethylbenzene 1 3 dimethylbenzene 2 3 4 5 Tetrahydrothiophene 1 1 dioxide sulfolane 1 2 dimethylbenzene sulfolane 1 2 dimethylbenzene n methylfo
Journal of Chemical & Engineering Data, 2010Co-Authors: Weikuan Chen, Chiehming J ChangAbstract:Vapor−liquid equilibria at (333.15, 343.15, and 353.15) K for seven binary mixtures of benzene + nonane, methylbenzene + 1,2-dimethylbenzene, 1,3-dimethylbenzene + 2,3,4,5-Tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + 2,3,4,5-Tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + N-methylformamide (NMF), 1,3-dimethylbenzene + NMF, and 1,4-dimethylbenzene + NMF have been obtained at pressures ranging from (0.01 to 101.3) kPa. The Wilson, nonrandom two-liquid (NRTL), and universal quasichemical (UNIQUAC) activity coefficient models have been employed to correlate experimental data to find intermolecular parameters. The nonideal behavior of the vapor phase has been considered by using the Peng−Robinson equation of state in calculating the vapor mole fraction. Liquid and vapor densities were measured by using two vibrating tube densitometers to determine liquid excess molar volumes. Six systems of benzene + nonane, 1,3-dimethylbenzene + 2,3,4,5-Tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + 2...
Zhenqiang Tang - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of Tetrahydrothiophene and Thiophene‐Fused Porphyrin.
ChemInform, 2016Co-Authors: Leilei Yang, Zhenqiang TangAbstract:The sulfa-Michael/aldol cascade reaction of 1,4-dithiane-2,5-diol to 2-NO2-porphyrin is developed providing a new facile approach to Tetrahydrothiophene-fused porphyrin.
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synthesis of Tetrahydrothiophene and thiophene fused porphyrin
ChemInform, 2016Co-Authors: Leilei Yang, Zhenqiang TangAbstract:The sulfa-Michael/aldol cascade reaction of 1,4-dithiane-2,5-diol to 2-NO2-porphyrin is developed providing a new facile approach to Tetrahydrothiophene-fused porphyrin.
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Synthesis of Tetrahydrothiophene and Thiophene-fused Porphyrin
Chemistry Letters, 2015Co-Authors: Leilei Yang, Zhenqiang TangAbstract:The sulfa-Michael/aldol cascade reaction of 1,4-dithiane-2,5-diol to 2-NO2-porphyrin has been developed, and this method provides a new facile approach to Tetrahydrothiophene-fused porphyrin. Therm...
Dieter Enders - One of the best experts on this subject based on the ideXlab platform.
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asymmetric synthesis of spiro Tetrahydrothiophene indan 1 3 diones via a squaramide catalyzed sulfa michael aldol domino reaction
Synthesis, 2016Co-Authors: Suruchi Mahajan, Pankaj Chauhan, Marcus Blumel, Rakesh Puttreddy, Kari Rissanen, Gerhard Raabe, Dieter EndersAbstract:A new asymmetric domino sulfa-Michael/aldol reaction of 2-arylidene-1,3-indandiones with 1,4-dithiane-2,5-diol catalyzed by a sub-mol% loading of a squaramide provides a direct access to Tetrahydrothiophene bearing spiro indane-1,3-dione derivatives in excellent yields and good stereoselectivities.
José L. Alonso - One of the best experts on this subject based on the ideXlab platform.
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Conformation and Stability of Adducts of Sulfurated Cyclic Compounds with Water: Rotational Spectrum of Tetrahydrothiophene-Water
The Journal of Physical Chemistry A, 1999Co-Authors: M. Eugenia Sanz, And Juan C. López, José L. Alonso, Assimo Maris, And Paolo G. Favero, Walther CaminatiAbstract:The ground-state rotational spectrum of the Tetrahydrothiophene···water complex (C4H8S···H2O) has been studied by free jet millimeter wave absorption and molecular beam Fourier transform microwave spectroscopy. The spectra of H2O and D2O combined with C4H832S and C4H834S were assigned. The rotational parameters have been interpreted in terms of a geometry in which the water molecule acts as proton donor lying close to the plane bisector to the CSC angle of Tetrahydrothiophene. The “free” hydrogen is entgegen to the ring. The parameters characterizing the hydrogen bond are the distance between the sulfur and hydrogen atoms, r(S···H) = 2.37(4) A, and the angle between the line bisecting the CSC angle of Tetrahydrothiophene and the S···H bond, φ = 85.(3)°. The deviation from collinearity of the atoms S···H−O is suggested from θ = 162.(12)°.
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observation and properties of the hydrogen bonded heterodimer Tetrahydrothiophene hcl
Journal of Physical Chemistry A, 1998Co-Authors: Maria Sanz, J. C. Lopez, José L. AlonsoAbstract:The ground-state rotational spectra of five isotopic species, C4H832S···H35Cl, C4H832S···H37Cl, C4H832S··· D35Cl, C4H832S···D37Cl, and C4H834S···H35Cl, of a hydrogen-bonded dimer between Tetrahydrothiophene and hydrogen chloride have been measured in the frequency range 6−18.5 GHz using a molecular beam Fourier transform microwave spectrometer. Spectral analysis gave rotational, quartic centrifugal distortion and Cl−nuclear quadrupole coupling constants for each isotopomer. The rotational and quadrupole coupling constants have been interpreted in terms of a geometry in which hydrogen chloride lies on the plane bisector to the CSC angle of Tetrahydrothiophene. The angle between the S···Cl internuclear line and the line bisecting the CSC angle was found to be 86.6(7)° and the distance r(S···Cl) = 3.48(3) A. The deviation of the atoms S···H−Cl involved in the hydrogen bond from a collinear arrangement (θ = 0°) was estimated to be θ ∼ 14°.
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Observation and Properties of the Hydrogen-Bonded Heterodimer Tetrahydrothiophene···HCl
The Journal of Physical Chemistry A, 1998Co-Authors: Maria Sanz, J. C. Lopez, José L. AlonsoAbstract:The ground-state rotational spectra of five isotopic species, C4H832S···H35Cl, C4H832S···H37Cl, C4H832S··· D35Cl, C4H832S···D37Cl, and C4H834S···H35Cl, of a hydrogen-bonded dimer between Tetrahydrothiophene and hydrogen chloride have been measured in the frequency range 6−18.5 GHz using a molecular beam Fourier transform microwave spectrometer. Spectral analysis gave rotational, quartic centrifugal distortion and Cl−nuclear quadrupole coupling constants for each isotopomer. The rotational and quadrupole coupling constants have been interpreted in terms of a geometry in which hydrogen chloride lies on the plane bisector to the CSC angle of Tetrahydrothiophene. The angle between the S···Cl internuclear line and the line bisecting the CSC angle was found to be 86.6(7)° and the distance r(S···Cl) = 3.48(3) A. The deviation of the atoms S···H−Cl involved in the hydrogen bond from a collinear arrangement (θ = 0°) was estimated to be θ ∼ 14°.