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dc.creatorDewberry, Christopher T.en_US
dc.creatorGrubbs, Garry S., IIen_US
dc.creatorCooke, Stephen A.en_US
dc.date.accessioned2009-07-29T13:03:45Z
dc.date.available2009-07-29T13:03:45Z
dc.date.issued2009en_US
dc.identifier2009-MH-05en_US
dc.identifier.urihttp://hdl.handle.net/1811/38349
dc.descriptionAuthor Institution: The Department of Chemistry, University of North Texas, P.O. Box 305070, Denton, TX, 76203-5070en_US
dc.description.abstractUsing both chirped pulse-, and low frequency cavity-based Fourier transform spectroscopy over 700 transitions have been recorded for the title molecule for the first time. The C$_1$, C$_2$ and C$_3$ carbon-13 species have been observed in natural abundance allowing a substitution structure for the CCC backbone to be determined. Nearly all the transitions observed were either $a$-type $R$ branches or $b$-type $Q$ branches. No $c$-type transitions were observed. The $\chi_{aa}$, $\chi_{bb}$, $\chi_{cc}$ and $\chi_{ab}$ components of the iodine nuclear quadrupole coupling tensor have been determined. Of note, several forbidden transitions were also observed, such as $J_{k_{-1},k_{+1}}$ $F$ = 14$_{4,10}$ 23/2 $\leftarrow$ 12$_{5,7}$ 21/2. In this particular case it seems that the upper energy level is nearly degenerate with a level connected to the lower energy level by a $\mu_a$ dipole component term, but the lower energy level is also nearly degenerate with a second level connected to the upper energy level, again by a $\mu_a$ dipole component term. The two intermediate energy levels are themselves connected by a $\mu_b$ dipole component term. Near degeneracies such as these, together with a large $\chi_{ab}$ value ($\approx$ 1 GHz) mean that certain $\Delta J = 2$ transitions become allowed. This phenomena has been previously observed for 1-iodopropane by Fujitake and Hayashi (J. Mol. Spect, 127, (1988), 112-124).en_US
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleFORBIDDEN TRANSITIONS IN THE VERY RICH PURE ROTATIONAL SPECTRUM OF TRANS-1-IODOPERFLUOROPROPANEen_US
dc.typeArticleen_US


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