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Title:WAVEGUIDE CP-FTMW SPECTROSCOPY OF ETHYL CYANOFORMATE: EXPLORING THE POSSIBILITY OF SEEING EXCHANGE-AVERAGED STATES
Author(s):Westerfield, J. H.
Contributor(s):Shipman, Steven
Subject(s):Dynamics and kinetics
Abstract:The microwave spectrum of ethyl cyanoformate was recorded at 261 K from 8.7 - 26.5 GHz with waveguide chirped-pulse Fourier transform microwave spectroscopy (CP-FTMW). Ethyl cyanoformate has been studied previously by Suenram, True, and Bohn in a Stark modulation cell.\footnote{Suenram, R.D., True, N.S., and Bohn, R.K., Journal of Molecular Spectroscopy, 69, 435-444 (1978).} In that work, the data showed contributions from two stable ethyl cyanoformate conformers as well as an additional series of broad features ascribed to an exchange-averaged state, in analogy to similar features routinely seen in NMR chemical exchange measurements. In recent years, True has provided estimates for the lifetimes of these exchange species.\footnote{True, N.S., Journal of Physical Chemistry A, 113, 6936-6946 (2009).} Our high resolution spectra of a thermalized sample of ethyl cyanoformate at 261 K show contributions from \textit{syn-anti} and \textit{syn-gauche} conformers in agreement with the previous work. Using our standard data collection methods, however, we do not see evidence for the presence of exchange averaged bands. In this talk, we will highlight the similarities and differences of our work to previous work on this molecule and discuss the possibilities of observing these types of species with our spectrometer.
Issue Date:06/19/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100643
DOI:10.15278/isms.2018.TD02
Other Identifier(s):TD02
Date Available in IDEALS:2018-08-17
2018-12-12


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