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Measurement of the optical purity of fluorinated compounds using proton decoupled 19F NMR spectroscopy in a chiral liquid crystal solvent by Maria Jakubcova; Abdelkrim Meddour; Jean-Marie Péchiné; Ahmed Baklouti; Jacques Courtieu is a Chemistry article available to read on EtoBox.
What is Measurement of the optical purity of fluorinated compounds using proton decoupled 19F NMR spectroscopy in a chiral liquid crystal solvent about?
The use of trifluoroacetic anhydride as an achiral derivatizing agent for enantiomeric excess measurement through chiral liquid crystal NMR is described. Examples involving amines. amino acids and alcohols are provided. It is shown that the proton decoupled fluorine NMR spectra of the -CO-CF, group allow good enantiomeric discrimination based on both the chemical shifts and the dipolar splitting. The spectral separation is due to the differential ordering effect of enantiomers in the oriented chiral solvent. The results are then compared to the discriminating power of the -CO-CD, group that has been previously described using deuterium NMR in the same anisotropic medium. %
Who reads Measurement of the optical purity of fluorinated compounds using proton decoupled 19F NMR spectroscopy in a chiral liquid crystal solvent?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Maria Jakubcova; Abdelkrim Meddour; Jean-Marie Péchiné; Ahmed Baklouti; Jacques Courtieu
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-1139)
- Published
- 1997
- Language
- EN
- Field
- Chemistry (Physical Sciences)