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 Title: Microwave Spectrum And Geometry Of Cf3i…ph3 Author(s): Stephens, Susanna Louise Contributor(s): Legon, Anthony; Walker, Nick Subject(s): Chirped pulse Abstract: A chirped-pulse Fourier transform microwave spectrometer has been used to measure the microwave spectrum of $\mathrm{CF_{3}I \cdots PH_{3}}$ between 6.5 and 18.5 GHz. The complex was stabilised by supersonic expansion of a gas sample containing small percentages of $\mathrm{CF_{3}I}$ and $\mathrm{PH_{3}}$ in a balance of 6 bar of argon. The observed spectrum is consistent with a $C_{3\mathrm{v}}$ prolate symmetric top structure which displays evidence for internal rotation of the $\mathrm{PH_{3}}$ subunit about the principal axis. Over two hundred hyperfine transitions across eleven $J''\leftarrow J'$ transitions have been assigned to the internal rotor $A$-state allowing the rotational ($B_{0}$) and centrifugal distortion ($D_{J}$ and $D_{JK}$) constants as well as the nuclear electric quadrupole coupling constant of iodine ($\chi_{aa}$(I)) to be assigned for this state. For the $E$-state, the additional distortion terms $D_{Jm}$ and $D_{JKm}$ have been determined. The length of the halogen bond between the iodine and phosphorus atoms and the force constant of this bond have also been determined. Issue Date: 2014-06-20 Publisher: International Symposium on Molecular Spectroscopy Citation Info: Stephens, S.L.; Legon, A.; Walker, N. MICROWAVE SPECTRUM AND GEOMETRY OF CF3I…PH3. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.FD10 Genre: CONFERENCE PAPER/PRESENTATION Type: Text Language: English URI: http://hdl.handle.net/2142/51060 DOI: https://doi.org/10.15278/isms.2014.FD10 Rights Information: Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Date Available in IDEALS: 2014-09-172015-04-14
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