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application/vnd.openxmlformats-officedocument.presentationml.presentation ![]() | Presentation | Microsoft PowerPoint 2007 |
application/pdf ![]() | Abstract |
Description
Title: | Gas phase measurements of mono-fluoro-benzoic acids and the dimer of 3-fluoro-benzoic acid |
Author(s): | Li, Kexin |
Contributor(s): | Kukolich, Stephen G.; Kang, Lu; Pejlovas, Aaron M.; Carey, Spencer J.; Daly, Adam M. |
Subject(s): | Spectroscopy of Large Amplitude Motions |
Abstract: | \begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.3]{dim4.eps} \end{wrapfigure} The gas phase homodimer of 3-fluorobenzoic acid was detected and the spectra showed evidence of proton tunneling. Experimental rotational constants are A(0$^+$)= 1151.8(5), B(0$^+$)=100.3(5), C(0$^+$)= 87.64(3) MHz and A(0$^-$)=1152.2(5), B(0$^-$)= 100.7(5), C(0$^-$)=88.85(3) MHz for the two ground vibrational states split by the proton tunneling motion. The tunneling splitting ($\Delta$E) is approximately 560 MHz. This homodimer appears to be the largest carboxylic acid dimer observed with F-T microwave spectroscopy. Additionally, the microwave spectra of the mono-fluoro-benozic acids, (2-fluoro, 3-floro and 4-fluoro) benzoic acid have been measured in the frequency range of 4-14 GHz using a pulsed beam Fourier Transform microwave spectrometer. Measured rotational transition lines were assigned and fit using a rigid rotor Hamiltonian. Assignments were made for 3 conformers of 2-fluorobenzoic acid, 2 conformers of 3-fluorobenzoic acid and 1 conformer of 4-fluorobenzoic acid. |
Issue Date: | 2016-06-21 |
Publisher: | International Symposium on Molecular Spectroscopy |
Genre: | Conference Paper / Presentation |
Type: | Text |
Language: | En |
URI: | http://hdl.handle.net/2142/91066 |
Rights Information: | Copyright 2016 by the authors |
Date Available in IDEALS: | 2017-01-26 |