The rotational spectra of three conformers of the fluoroacetic acid−acrylic acid bimolecule have been assigned by pulsed jet Fourier Transform microwave spectroscopy. Information on their relative populations in the jet has been obtained by relative intensity measurements. In addition, the Ubbelohde effect has been quantitatively estimated from the changes of the planar moment of inertia Paa upon H→D isotopic substitution of the carboxylic hydrogens. The dissociation energies of the three conformers, as estimated from centrifugal distortion effects, have almost the same values for the three species
Qian Gou, Gang Feng, Luca Evangelisti, Walther Caminati (2013). Conformational Equilibria in Bimolecules of Carboxylic Acids: A Rotational Study of Fluoroacetic Acid–Acrylic Acid. THE JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 4, 2838-2842 [10.1021/jz4015037].
Conformational Equilibria in Bimolecules of Carboxylic Acids: A Rotational Study of Fluoroacetic Acid–Acrylic Acid
GOU, QIAN;FENG, GANG;EVANGELISTI, LUCA;CAMINATI, WALTHER
2013
Abstract
The rotational spectra of three conformers of the fluoroacetic acid−acrylic acid bimolecule have been assigned by pulsed jet Fourier Transform microwave spectroscopy. Information on their relative populations in the jet has been obtained by relative intensity measurements. In addition, the Ubbelohde effect has been quantitatively estimated from the changes of the planar moment of inertia Paa upon H→D isotopic substitution of the carboxylic hydrogens. The dissociation energies of the three conformers, as estimated from centrifugal distortion effects, have almost the same values for the three speciesI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
