THE MICROWAVE SPECTRUM OF $CHFCl_{2}$
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Date
1962
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Ohio State University
Abstract
Several low J transitions (including the $0_{\propto,0}\rightarrow 1_{1,0}$ transitions) have been measured in the microwave rotational spectra of $C^{12}HFCl_{2}^{35}$ and $C^{12}HFCl^{33}Cl^{37}$. The hyperfine splitting of these transitions has been interpreted by means of the tables of G. W. Robinson and C. D. Cornwell to give the nuclear electric quadrupole coupling components $eQVaa = -41.2 \pm 0.3 Mc/s. eQVbb = + 11.7 \pm 0.3 Mc/s$ and $eQVec = + 29.62 \pm 0.10 Mc/s$. The distance between the chlorine nuclei has been determined to be 2.906 {\AA} by both Kraitchman's equations and by the out-of-plane contributions to the moments of inertia. When this distance is combined with an estimated length of 1.76 {\AA} for he C-Cl bond, then the angle Cl-C-Cl can be determined to be $112.2^{\circ}$. this angle along with the quadrupole coupling components, gives a value for eQq of -77.3 Mc/s by two independent methods using different components. The equality of the two calculated values suggests that the quadrupole coupling asymmetry parameter $\eta$ is almost equal to zero.
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Author Institution: Department of Physics, University of New Brunswick