Fourier Transform Microwave Spectroscopy and Molecular Structure of the 1,1-DIFLUOROETHYLENE-HF Complex

Details Fourier Transform Microwave Spectroscopy and Molecular Structure of the 1,1-DIFLUOROETHYLENE-HF Complex Fourier Transform Microwave Spectroscopy and Molecular Structure of the 1,1-DIFLUOROETHYLENE-HF Complex

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mss..conferc02m&link_type=abstract

"International Symposium On Molecular Spectroscopy, 64th Meeting, Held 22-26 June, 2009 at Ohio State University. http://molspec

Physics

Microwave

Scientific paper

The rotational spectra of six isotopomers of 1,1-difluoroethylene-HF have been collected in the 7 - 22 GHz region with a Fourier transform microwave spectrometer. These include the most abundant isotopomer, its DF counterpart, and four singly substituted ^{13}C species in natural abundance. Both a- and b-type transitions have been observed for all species. In addition, the hydrogen-fluorine spin-spin coupling interaction in the HF subunit for CH_2CF_2-HF and the deuterium nuclear quadrupole coupling interaction in CH_2CF_2-DF have been observed and analyzed. The rotational constants are consistent with a planar complex, with the two subunits interacting through a hydrogen bond formed between the H atom of HF and an F atom in 1,1-difluoroethylene and via a secondary interaction between the F atom in HF and the H atom located cis to the hydrogen-bonded F atom in 1,1-difluoroethylene. The rotational constants, hyperfine coupling constants, and results from the analogous complex, CH_2CF_2-HCCH, are combined to determine the structural parameters of 1,1-difluoroethylene-HF and 1,1-difluoroethylene-DF, which are found to be slightly different.
H. O. Leung and M. D. Marshall, J. Chem. Phys. 125, 154301 (2006).

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