ROTATIONAL SPECTROSCOPY OF ZnCCH (X$^{2}\Sigma^+$)AT MICROWAVE AND MILLIMETER WAVELENGTHES
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Date
2011
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Publisher
Ohio State University
Abstract
The pure rotational spectrum of ZnCCH (X$^{2}\Sigma^+$) has been measured using Fourier transform microwave (FTMW) and direct absorption millimeter/submillimeter methods in the frequency range of 7-260 GHz. This is the first study of ZnCCH by any spectroscopic technique. In the FTMW system, the molecule was synthesized using discharge assisted laser ablation spectroscopy (DALAS) from a mixture of 0.05\% acetylene in argon and the ablation of a zinc rod. In the millimeter-wave spectrometer, the radical was created from the reaction of zinc vapor, produced in a Broida-type oven, with HCCH in a DC discharge. Spectra of the main isoplogue, $^{64}$ZnCCH, as well as $^{66}$ZnCCH, $^{68}$ZnCCH, ZnCCD and Zn$^{13}$C$^{13}$CH have been recorded. The data have been analyzed with a $^{2}$$\Sigma$ Hamiltonian and rotational, spin-rotation and H, D and $^{13}$C hyperfine parameters have been determined. The structure is being calculated based on the rotational constants and will be presented. Interpretation of the hyperfine constants will also be discussed.
Description
Author Institution: University of Arizona, Department of Chemistry and Biochemitry and Steward Observatory, Tucson, AZ-85721