JET AND LASER OPTOGALVANIC STUDIES OF THE ELECTRONIC SPECTRA OF $GeH_{2}$ AND $GeD_{2}$ AND AN IMPROVED STRUCTURE FOR GERMYLENE
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Date
2000
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Publisher
Ohio State University
Abstract
In 1995, we reported the structure of $GeH_{2}$, based on the assignment of 16 rotational lines in the LIF spectrum of the $0^{0}_{0}$ band of the $\widetilde{A}^{1} B_{1} - \widetilde{X}^{1} A_{1}$ electronic $transition.^{a}$ The number of observed rotational transitions was severely limited by an inhomogeneous predissociation in the excited state. We have now recorded high resolution LIF spectra of the $0^{0}_{0}$ band of jet-cooled $GeD_{2}$ using the pulsed discharge technique with a $GeD_{3}Cl$ precursor. The spectrum is much more extensive than that of $GeH_{2}$ due to less efficient tunneling through the barrier dissociation on deuteration. Portions of the room temperature $0^{0}_{0}$ band absorption spectrum of $GeH_{2}$ have also been studied at Doppler-limited resolution using the laser optogalvanic technique. Rotational analysis of these spectra has provided the ground and excited state rotational constants for several germanium isotopomers. These data have been used to obtain an improved structure for germylene.
Description
$^{a}$J. Karolczak, W.W. Harper, R. S. Grev, and D. J. Clouthier, J. Chem. Phys. 103, 2839 (1995).
Author Institution: Department of Chemistry, University of Kentucky; Department of Chemistry, University of New Brunswick
Author Institution: Department of Chemistry, University of Kentucky; Department of Chemistry, University of New Brunswick