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MICROWAVE SPECTROSCOPY MEASUREMENTS OF THE GAS PHASE STRUCTURE OF CYCLOPENTADIENYL TUNGSTENTRICARBONYL HYDRIDE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/30519

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Title: MICROWAVE SPECTROSCOPY MEASUREMENTS OF THE GAS PHASE STRUCTURE OF CYCLOPENTADIENYL TUNGSTENTRICARBONYL HYDRIDE
Creators: Karunatilaka, Chandana; Tanjaroon, Chakree; Keck, Kristen; Kukolich, Stephen G.
Issue Date: 2005
Abstract: \begin{wrapfigure}[10]{r}{5.5cm} \vspace{-1.2cm} \hspace{-0.1cm} \epsfig{file=test.eps} \end{wrapfigure} Microwave spectra for five unique $^{13}$C isotopomers of cyclopentadienyltungstentricarbonyl hydride were measured using a Flygare-Balle type microwave spectrometer system. The new rotational constants were combined with the previously obtained rotational constants for normal and deuterium analogues for various tungsten isotopes. A total of fifty-seven rotational constants were acquired and used in the least squares fit to obtain the gas phase structure of this d$^4$ - metal mono hydride complex. The results from the structural fit yielded the W-H bond length: r$_o$(W-H)= 1.788(20) \AA, which agrees very well with the previously reported Kraitchman value of r$_s$(W-H)= 1.79(4) \AA. The present study also yielded the distance from tungsten to the centroid distance of the C$_5$H$_5$ ring: r(W-Cp)= 2.02(1) \AA, the ring radius of Cp: r(Cp)= 1.2016(4) \AA, the average bond length from tungsten to the carbonyl carbon, r(W-CO)= 1.981(14) \AA, and the average cyclopentadienyl C-C bond length of 1.421(4) \AA. \\ Results obtained from the structural fit are in much closer agreement with the Kraitchman values than with the DFT results.
URI: http://hdl.handle.net/1811/30519
Other Identifiers: 2005-TA-11
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