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

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

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

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

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

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