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Updated: Jul 5, 2025

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Conformations and hydration of halopropionic acids studied by molecular dynamics and Raman optical activity
Marie Berešová1, Jiří Bufka2, Martin Šafařík1
1Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, 16610 Prague 6, Czech Republic.
Abstract:
Chiral 2-halopropionic acids and their derivatives were synthesized and their properties studied computationally using Raman and Raman optical activity (ROA) spectroscopy. For neat acids present as liquids small amount of water led to significant changes in the spectra, resulting even to flipping of some ROA band signs. We find this interesting for the role water plays in interpretation of vibrational optical activity spectra of biomolecules. Analysis of the results shows that when the water is present, it can change ROA band signs due to the changes in acidobasic equilibrium. Corresponding esters without acidic hydrogens do not exhibit such effects.
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