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Title:AN INVESTIGATION OF THE DIPOLE FORBIDDEN TRANSITION EFFECTS IN BROMOFLUOROCARBONS AS IT PERTAINS TO 3-BROMO-1,1,1,2,2-PENTAFLUOROPROPANE USING CP-FTMW SPECTROSCOPY
Author(s):Grubbs II, G. S.
Contributor(s):Bailey, William C.; Shreve, N. E.; Gillcrist, David Joseph; Persinger, Thomas D.; Moon, Nicole; Marshall, Frank E
Subject(s):(Hyper)fine structure, tunneling
Abstract:begin{wrapfigure}{r}{0pt}_x000d_ _x000d_ includegraphics[scale=0.6]{bromopentafluoropropane.eps}_x000d_ _x000d_ end{wrapfigure}_x000d_ _x000d_ As part of a series of bromofluorocarbon species and analogues, the microwave spectrum of the molecule 3-bromo-1,1,1,2,2-pentafluoropropane has been measured on a CP-FTMW spectrometer located at Missouri S&T. The resultant spectrum is dense with transitions occurring at a rate of $approx$1 transition/MHz! Within the spectrum, $^{79}$Br and $^{81}$Br isotopologues of multiple conformers of 3-bromo-1,1,1,2,2-pentafluoropropane have been identified. Rotational constants, centrifugal distortion parameters, nuclear quadrupole coupling constants and how each compare with theory for each conformer will be discussed. _x000d_ _x000d_ Due to the large quadrupolar moment of bromine, heavy, brominated molecules are good candidates for dipole-forbidden transitions. Previous studies with bromoperfluoroacetonefootnote{F. E. Marshall, D. J. Gillcrist, T. D. Persinger, S. Jaeger, C. C. Hurley, N. E. Shreve, N. Moon, and G. S. Grubbs II, textit{J. Mol. Spectrosc.} textbf{328} (2016) 59.} provided a rich spectrum full of dipole forbidden transitions that 3-bromo-1,1,1,2,2-pentafluoropropane does not share. This difference will be explained using structural considerations along with the matrix elements needed to enact these transitions.
Issue Date:6/23/2017
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/96895
DOI:10.15278/isms.2017.FB05
Date Available in IDEALS:2017-07-27


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