ROTATIONAL SPECTRA OF THE $Ne-NH_{3}$ and $Kr-NH_{3}$ VAN DER WAALS COMPLEXES

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1999

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Ohio State University

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Rotational spectra of the $Ne-NH_{3}$ and $Kr-NH_{3}$ van der Waals complexes were measured between 4 and 24 GHz using a pulsed jet cavity Fourier transform microwave spectrometer. The isotopomers studied include those of $^{14}NH_{3}$ and $^{15}NH_{3}$ with $^{22}$Ne and $^{20}Ne$ and with the 5 most abundant isotopes of Kr. Transitions corresponding to the $RG+NH_{3} \Sigma(J=0,|k|-0)$ internal rotor state have been measured and assigned for the Ne and Kr isotopomers and transitions related to the $\Sigma(j=1,|k|=1)$ state have been tentatively assigned for the Kr isotopomers. The spectra of the complexes containing $^{83}Kr$ and $^{14}N$ showed nuclear hyperfine structure due to the quadrupole moments of the nuclei. Rotational, centrifugal distortion and quadrupole coupling constants were determined and used to calculate structural parameters.

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Author Institution: Department of Chemistry, University of Alberta

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