THE MICROWAVE SPECTRA, QUADRUPOLE COUPLING CONSTANTS, AND STRUCTURE OF N-CHLORODIFLUOROMETHANIMINE AND N-BROMODIFLUOROMETHANIMINE
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Date
1987
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Publisher
Ohio State University
Abstract
The microwave spectra of N-chlorodifluromethanimine (chlorocarbonimidic difluoride), $CF_{2}N^{35}Cl$ and $CF_{2}N^{37}Cl$, have been investigated from 18 to 39.5 GHz. The hyperfine structure due to the quadrupole coupling with the chlorine and $^{14}N$ nuclei has been analyzed for a- and b-type transitions of both isotopic species. From experimental diagonal and off-diagonal quadrupole coupling constants, principal coupling constants of -94-7(1) and -74(1) MHz were calculated for the $^{35}Cl$ and $^{37}Cl$ isotopes. A molecular structure compatible with the rotational and quadrupole coupling constants has been determined with r(N-Cl) and r(C=N) having values of 1.700 and 1.254 {\AA}, respectively, and $*CNCl = 116.4(14)^{\circ}$. The microwave spectra of N-bromodifluoromethanimine (bromocarbonimidic difluoride). $CF_{2}N^{79}Br$ and $CF_{2}N^{*1}Br$, have also been investigated from 18 to 39.5 GHz. The hyperfine structure due to the quadrupole coupling with the bromine nucleus has been analyzed for the Q-branch transitions of both isotopic species. These data are compared to the corresponding information obtained for the related chlorine compound.
Description
Author Institution: Department of Chemistry, University of South Carolina; Department of Chemistry, Clemson University