MICROWAVE SPECTRUM, BROMINE NUCLEAR QUADRUPOLE COUPLING CONSTANTS, AND STRUCTURE OF BROMODIFLUOROMATHANE
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Date
1996
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Ohio State University
Abstract
Microwave spectrum of bromodifluoromathane, $CHBrF_{2}$ (Freon FC-22Bl), for the $^{79}$Br and $^{81}$Br species has been studied by a Stark modulation spectrometer. The Spectrum consists of strong $c$-type and weak $a$-type transitions. A simultaneous least-squares analysis of the observed transition frequencies gave the rotational, quartic centrifugal distortion, and bromine nuclear quadrupole coupling constants. The distance for the $^{79}$Br and $^{81}$Br species are 2.171843 \AA and 2.171849 \AA, respectively. These distance are slightly longer than the corresponding value 2.17053 \AA in $CHCIF_{2}$. The electronic characters of the C-Br bond have been determined from the bromine nuclear quadrupole coupling constants and are compared with those of other related molecules.
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Author Institution: Department of Chemistry, Faculty of Science, Shizuoka University