The Experts below are selected from a list of 1611 Experts worldwide ranked by ideXlab platform
María Angeles Gomariz Vicente - One of the best experts on this subject based on the ideXlab platform.
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Application of Methyl Cinnamate/montmorillonite as ultraviolet radiation shelters
Drug Development and Industrial Pharmacy, 1996Co-Authors: C. Del Hoyo, Vicente Rives, María Angeles Gomariz VicenteAbstract:AbstractThe interaction of Methyl Cinnamate/montmorillonite samples prepared by melting the former onto the second or by joint grinding, has been studied by x-ray diffraction. differential thermal analysis, thermogravimetric analysis and Fourier-transform infrared spectroscopy. Formation of an interlayer compound has been observed, leading to an increase of 4.15 or 3.42 A (samples obtained by melting or grinding, respectively) in the basal spacing of the clay. Formation of such a complex leads to a displacement of molecular water from the interlayer space, as concluded from the thermal studies. No chemical change is observed in the Methyl Cinnamate molecule, as confirmed by infrared spectroscopy. The system prepared improve the shelter properties of the clay and the drug separately, mainly in the C zone of the ultraviolet spectrum (290-190 nm).
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application of Methyl Cinnamate montmorillonite as ultraviolet radiation shelters
Drug Development and Industrial Pharmacy, 1996Co-Authors: C. Del Hoyo, Vicente Rives, María Angeles Gomariz VicenteAbstract:AbstractThe interaction of Methyl Cinnamate/montmorillonite samples prepared by melting the former onto the second or by joint grinding, has been studied by x-ray diffraction. differential thermal analysis, thermogravimetric analysis and Fourier-transform infrared spectroscopy. Formation of an interlayer compound has been observed, leading to an increase of 4.15 or 3.42 A (samples obtained by melting or grinding, respectively) in the basal spacing of the clay. Formation of such a complex leads to a displacement of molecular water from the interlayer space, as concluded from the thermal studies. No chemical change is observed in the Methyl Cinnamate molecule, as confirmed by infrared spectroscopy. The system prepared improve the shelter properties of the clay and the drug separately, mainly in the C zone of the ultraviolet spectrum (290-190 nm).
A Nguyen - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic properties and ideal gas enthalpies of formation for trans Methyl Cinnamate α Methyl cinnamaldehyde Methyl methacrylate 1 nonyne triMethylacetic acid triMethylacetic anhydride and ethyl triMethyl acetate
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, A B Cowell, And S E Knipmeyer, A NguyenAbstract:The results of a study aimed at improvement of group-contribution methodology for estimation of thermodynamic properties of organic substances are reported. Specific weaknesses where particular group-contribution terms were unknown, or estimated because of lack of experimental data, are addressed by experimental studies of enthalpies of combustion in the condensed phase, vapor-pressure measurements, and differential scanning calorimetric heat-capacity measurements. Ideal-gas and condensed-phase enthalpies of formation of trans-Methyl Cinnamate, α-Methyl cinnamaldehyde, Methyl methacrylate, 1-nonyne, triMethylacetic acid, triMethylacetic anhydride, and ethyl triMethyl acetate are reported. Enthalpies of fusion were determined for trans-Methyl Cinnamate and triMethylacetic acid. Two-phase (solid + vapor) or (liquid + vapor) heat capacities were determined from 300 K to the critical region or earlier decomposition temperature for all the compounds. For ethyl triMethyl acetate, the values of the critical temp...
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Thermodynamic Properties and Ideal-Gas Enthalpies of Formation for trans-Methyl Cinnamate, α-Methyl Cinnamaldehyde, Methyl Methacrylate, 1-Nonyne, TriMethylacetic Acid, TriMethylacetic Anhydride, and Ethyl TriMethyl Acetate
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, A B Cowell, And S E Knipmeyer, A NguyenAbstract:The results of a study aimed at improvement of group-contribution methodology for estimation of thermodynamic properties of organic substances are reported. Specific weaknesses where particular group-contribution terms were unknown, or estimated because of lack of experimental data, are addressed by experimental studies of enthalpies of combustion in the condensed phase, vapor-pressure measurements, and differential scanning calorimetric heat-capacity measurements. Ideal-gas and condensed-phase enthalpies of formation of trans-Methyl Cinnamate, α-Methyl cinnamaldehyde, Methyl methacrylate, 1-nonyne, triMethylacetic acid, triMethylacetic anhydride, and ethyl triMethyl acetate are reported. Enthalpies of fusion were determined for trans-Methyl Cinnamate and triMethylacetic acid. Two-phase (solid + vapor) or (liquid + vapor) heat capacities were determined from 300 K to the critical region or earlier decomposition temperature for all the compounds. For ethyl triMethyl acetate, the values of the critical temp...
Gonzalo Rodríguez - One of the best experts on this subject based on the ideXlab platform.
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total diastereoselectivity in the one pot multistep reaction of rs 4 Methylphenyl sulfinyl Methyl 1 oxa 4 azaspiro 4 5 dec 3 ene and e Methyl Cinnamate an approach to 2s 4s 5r 6r 2 hydroxyMethyl 4 6 diphenyl 1 azabicycle 3 3 1 nonane
Tetrahedron-asymmetry, 2008Co-Authors: Carlos Alvarezibarra, Juan Collados F Lujan, Maria L Quirogafeijoo, Gonzalo RodríguezAbstract:Abstract The base-mediated reaction of enantiomerically pure α-sulfinylketimine (+)- 1 with ( E )-Methyl Cinnamate afforded (+)- 5a in a one-pot procedure with complete diastereoselectivity. A sole diastereomer of the eight possible ones was isolated which revealed the stereocontrol of the chiral sulfinyl group in the construction of the three new stereogenic centres. The absolute configuration of stereocentres introduced in (+)- 5a was assigned on the basis of 1 H NMR data and a single X-ray structure.
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Total diastereoselectivity in the one-pot multistep reaction of (RS)-(+)-{[(4-Methylphenyl)sulfinyl]Methyl}-1-oxa-4-azaspiro[4.5]dec-3-ene and E-Methyl Cinnamate. An approach to (2S,4S,5R,6R)-2-(hydroxyMethyl)-4,6-diphenyl-1-azabicycle[3.3.1]nonane
Tetrahedron: Asymmetry, 2008Co-Authors: Carlos Alvarez-ibarra, Juan F. Collados Luján, María L. Quiroga-feijóo, Gonzalo RodríguezAbstract:Abstract The base-mediated reaction of enantiomerically pure α-sulfinylketimine (+)- 1 with ( E )-Methyl Cinnamate afforded (+)- 5a in a one-pot procedure with complete diastereoselectivity. A sole diastereomer of the eight possible ones was isolated which revealed the stereocontrol of the chiral sulfinyl group in the construction of the three new stereogenic centres. The absolute configuration of stereocentres introduced in (+)- 5a was assigned on the basis of 1 H NMR data and a single X-ray structure.
C. Del Hoyo - One of the best experts on this subject based on the ideXlab platform.
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Application of Methyl Cinnamate/montmorillonite as ultraviolet radiation shelters
Drug Development and Industrial Pharmacy, 1996Co-Authors: C. Del Hoyo, Vicente Rives, María Angeles Gomariz VicenteAbstract:AbstractThe interaction of Methyl Cinnamate/montmorillonite samples prepared by melting the former onto the second or by joint grinding, has been studied by x-ray diffraction. differential thermal analysis, thermogravimetric analysis and Fourier-transform infrared spectroscopy. Formation of an interlayer compound has been observed, leading to an increase of 4.15 or 3.42 A (samples obtained by melting or grinding, respectively) in the basal spacing of the clay. Formation of such a complex leads to a displacement of molecular water from the interlayer space, as concluded from the thermal studies. No chemical change is observed in the Methyl Cinnamate molecule, as confirmed by infrared spectroscopy. The system prepared improve the shelter properties of the clay and the drug separately, mainly in the C zone of the ultraviolet spectrum (290-190 nm).
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application of Methyl Cinnamate montmorillonite as ultraviolet radiation shelters
Drug Development and Industrial Pharmacy, 1996Co-Authors: C. Del Hoyo, Vicente Rives, María Angeles Gomariz VicenteAbstract:AbstractThe interaction of Methyl Cinnamate/montmorillonite samples prepared by melting the former onto the second or by joint grinding, has been studied by x-ray diffraction. differential thermal analysis, thermogravimetric analysis and Fourier-transform infrared spectroscopy. Formation of an interlayer compound has been observed, leading to an increase of 4.15 or 3.42 A (samples obtained by melting or grinding, respectively) in the basal spacing of the clay. Formation of such a complex leads to a displacement of molecular water from the interlayer space, as concluded from the thermal studies. No chemical change is observed in the Methyl Cinnamate molecule, as confirmed by infrared spectroscopy. The system prepared improve the shelter properties of the clay and the drug separately, mainly in the C zone of the ultraviolet spectrum (290-190 nm).
W V Steele - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic properties and ideal gas enthalpies of formation for trans Methyl Cinnamate α Methyl cinnamaldehyde Methyl methacrylate 1 nonyne triMethylacetic acid triMethylacetic anhydride and ethyl triMethyl acetate
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, A B Cowell, And S E Knipmeyer, A NguyenAbstract:The results of a study aimed at improvement of group-contribution methodology for estimation of thermodynamic properties of organic substances are reported. Specific weaknesses where particular group-contribution terms were unknown, or estimated because of lack of experimental data, are addressed by experimental studies of enthalpies of combustion in the condensed phase, vapor-pressure measurements, and differential scanning calorimetric heat-capacity measurements. Ideal-gas and condensed-phase enthalpies of formation of trans-Methyl Cinnamate, α-Methyl cinnamaldehyde, Methyl methacrylate, 1-nonyne, triMethylacetic acid, triMethylacetic anhydride, and ethyl triMethyl acetate are reported. Enthalpies of fusion were determined for trans-Methyl Cinnamate and triMethylacetic acid. Two-phase (solid + vapor) or (liquid + vapor) heat capacities were determined from 300 K to the critical region or earlier decomposition temperature for all the compounds. For ethyl triMethyl acetate, the values of the critical temp...
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Thermodynamic Properties and Ideal-Gas Enthalpies of Formation for trans-Methyl Cinnamate, α-Methyl Cinnamaldehyde, Methyl Methacrylate, 1-Nonyne, TriMethylacetic Acid, TriMethylacetic Anhydride, and Ethyl TriMethyl Acetate
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, A B Cowell, And S E Knipmeyer, A NguyenAbstract:The results of a study aimed at improvement of group-contribution methodology for estimation of thermodynamic properties of organic substances are reported. Specific weaknesses where particular group-contribution terms were unknown, or estimated because of lack of experimental data, are addressed by experimental studies of enthalpies of combustion in the condensed phase, vapor-pressure measurements, and differential scanning calorimetric heat-capacity measurements. Ideal-gas and condensed-phase enthalpies of formation of trans-Methyl Cinnamate, α-Methyl cinnamaldehyde, Methyl methacrylate, 1-nonyne, triMethylacetic acid, triMethylacetic anhydride, and ethyl triMethyl acetate are reported. Enthalpies of fusion were determined for trans-Methyl Cinnamate and triMethylacetic acid. Two-phase (solid + vapor) or (liquid + vapor) heat capacities were determined from 300 K to the critical region or earlier decomposition temperature for all the compounds. For ethyl triMethyl acetate, the values of the critical temp...