University of Illinois Urbana-Champaign

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

Grubbs, G.S., II

Content Files
2498.pdf
916766.pptx

Permalink

https://hdl.handle.net/2142/96895

Description

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, G.S., II
Contributor(s)
  • Bailey, William C.
  • Shreve, N.E.
  • Gillcrist, David Joseph
  • Persinger, Thomas D.
  • Moon, Nicole
  • Marshall, Frank E.
Issue Date
2017-06-23
Keyword(s)
  • (Hyper)fine structure
  • Tunneling
Date of Ingest
  • 2017-07-27T20:15:11Z
  • 2018-01-29T23:05:24Z
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.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/96895
DOI
https://doi.org/10.15278/isms.2017.FB05
Copyright and License Information
Copyright 2017 G.S. Grubbs II

Owning Collections

Abstracts & Presentations - 2017 International Symposium on Molecular Spectroscopy PRIMARY