THE PURE ROTATIONAL SPECTRUM OF $CuCH_{3}$

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2002

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Ohio State University

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The pure rotational spectrum of $CuCH_{3} (\tilde{X}^{1}A_{1})$ has been measured with millimeter-wave direct absorption techniques in the frequency range of 312 to 543 GHz. This work is the first spectroscopic observation of monomeric $CuCH_{3}$ in the gas-phase. Measurements have been made of the two Cu isotopomers, $^{63}$Cu and $^{65}$Cu, in the ground and $v_{3}=1$ (the Cu-C stretch) vibrational states. Copper monomethyl was formed by the reaction of Cu vapor produced in a Broida-type oven and $Sn(CH_{3})_{4}$. Ten transitions of both isotopomers have been recorded with K components up to 13. Additional work is being conducted on $Cu^{13}CH_{3}$ and $CuCD_{3}$. From this data, spectroscopic constants and structural information are being determined. Establishing the geometry of copper monomethyl is significant for organometallic chemistry.

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Author Institution: Department of Chemistry, Department of Astronomy, and Steward Observatory, University of Arizona; Department of Chemistry, San Diego State University; Department of Chemistry, Department of Astronomy, and Steward Observatory, University of Arizona

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