dc.creator Kranze, Richard H. en_US dc.creator Rittby, C. M. L. en_US dc.creator Graham, W. R. M. en_US dc.date.accessioned 2007-11-20T17:12:32Z dc.date.available 2007-11-20T17:12:32Z dc.date.issued 1995 en_US dc.identifier 1995-TC-10 en_US dc.identifier.uri http://hdl.handle.net/1811/29764 dc.description 1. J.R. Heath and R.J. Saykally, J. Chem, Phys, 93, 8392 (1990). en_US dc.description Author Institution: Texas Christian University, Fort Worth, TX 76133. en_US dc.description.abstract Recent ab initio calculations for the linear $C_{9}$ carbon cluster have shown a notable lack of convergence in the values of the frequencies and intensities predicted for the antisymmetric stretching modes $\nu_{5}, \nu_{6}$, and $\nu_{7}$. This situation has motivated a search for a second antisymmetric fundamental in addition to the $\nu_{5}(\sigma_{u})$ already observed at $2014.28 cm^{-1}$ in the gas $phase.^{1}$ This paper reports Fourier transform infrared observations of $C_{9}$ in solid Ar resulting in the identification for the first time of the $\nu_{7}(\sigma_{u})$ mode at $1601.0 cm^{-1}$. Comparison of $^{13}C$ isotopic shifts measured for over 200 isotopomers with the predictions of DFT (density functional theory) and CCSD (coupled cluster) calculations, conclusively confirms the assignment of the new mode. The results of isotopic measurements for the $\nu_{5}(\sigma_{u})$ antisymmetric stretching mode of linear $C_{7}$ at $1894.3 cm^{-1}$ and comparison with ab initio calculations are also reported. en_US dc.format.extent 51907 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title FIRST DETECTION OF THE $\nu_{7}(\sigma_{u})$ STRETCHING FUNDAMENTAL OF LINEAR $C_{9}$ AND STUDY OF THE $\nu_{5}(\sigma_{u})$ MODE OF LINEAR $C_{7}$ IN Ar AT 10 K en_US dc.type article en_US
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