Results 181 to 190 of about 2,440 (209)
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Molecular Physics, 1988
From matrix formalisms for VCD and ROA inspired by the polar tensor infrared intensity theory, and by the polar tensor and the Mayants-Averbukh Raman intensity theories, it is found that the APT approach of Freedman and Nafie can be extended by appropriate transformations of the occurring origin dependent atomic axial tensors (AATs).
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From matrix formalisms for VCD and ROA inspired by the polar tensor infrared intensity theory, and by the polar tensor and the Mayants-Averbukh Raman intensity theories, it is found that the APT approach of Freedman and Nafie can be extended by appropriate transformations of the occurring origin dependent atomic axial tensors (AATs).
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European Journal of Organic Chemistry, 2010
AbstractBoth enantiomers of an optically active trialkynyl(phenyl)methane (the key building blocks in the construction of a stable expanded cubane) have been prepared. The strategy involved the resolution of a racemic intermediate by means of HPLC on a chiral stationary phase.
Boris Buschhaus +5 more
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AbstractBoth enantiomers of an optically active trialkynyl(phenyl)methane (the key building blocks in the construction of a stable expanded cubane) have been prepared. The strategy involved the resolution of a racemic intermediate by means of HPLC on a chiral stationary phase.
Boris Buschhaus +5 more
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Tetrahedron Letters, 2003
Abstract Cruciferous phytoalexin related metabolites, (−)-dioxibrassinin ( 1 ) and (−)-3-cyanomethyl-3-hydroxyoxindole ( 2 ) were prepared from isatin as racemates and were resolved by chiral HPLC. Their absolute configurations were determined by the new chiroptical technique, vibrational circular dichroism (VCD), as well as by the conventional ...
Kenji Monde +6 more
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Abstract Cruciferous phytoalexin related metabolites, (−)-dioxibrassinin ( 1 ) and (−)-3-cyanomethyl-3-hydroxyoxindole ( 2 ) were prepared from isatin as racemates and were resolved by chiral HPLC. Their absolute configurations were determined by the new chiroptical technique, vibrational circular dichroism (VCD), as well as by the conventional ...
Kenji Monde +6 more
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ChemInform, 2013
AbstractReview: 40 refs.
Steven S. Wesolowski, Don E. Pivonka
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AbstractReview: 40 refs.
Steven S. Wesolowski, Don E. Pivonka
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2011
This chapter describes the potential and limitations of attenuated total reflection infrared (ATR-IR) spectroscopy, modulation excitation spectroscopy (MES), and vibrational circular dichroism (VCD) for the investigation of bio-interfaces. The three techniques are completely independent of each other although ATR-IR and MES can be combined.
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This chapter describes the potential and limitations of attenuated total reflection infrared (ATR-IR) spectroscopy, modulation excitation spectroscopy (MES), and vibrational circular dichroism (VCD) for the investigation of bio-interfaces. The three techniques are completely independent of each other although ATR-IR and MES can be combined.
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1997
The FT-IR absorption and FT-IR VCD spectra in the region 1600−800 cm−1 are reported for 2-vinyl-exo-borneol and compared to those of camphor. Optimized geometries, harmonic force fields, and absorption spectra were calculated by ab initio means at the 6−31G*(03) level of RHF/SCF for both molecules.
Dimiter Tsankov +2 more
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The FT-IR absorption and FT-IR VCD spectra in the region 1600−800 cm−1 are reported for 2-vinyl-exo-borneol and compared to those of camphor. Optimized geometries, harmonic force fields, and absorption spectra were calculated by ab initio means at the 6−31G*(03) level of RHF/SCF for both molecules.
Dimiter Tsankov +2 more
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New frontiers in enzyme immobilisation: robust biocatalysts for a circular bio-based economy
Chemical Society Reviews, 2021Roger Arthur Sheldon, Dean Brady
exaly