Waveguide CP-FTMW spectroscopy of ethyl cyanoformate: Exploring the possibility of seeing exchange-averaged states

Westerfield, J. H.

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https://hdl.handle.net/2142/100643 Copy

Description

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

Issue Date

2018-06-19

Keyword(s)

Dynamics and kinetics

Date of Ingest

• 2018-08-17T16:09:25Z
• 2018-12-12T22:35:31Z

Abstract

The microwave spectrum of ethyl cyanoformate was recorded at 261 K from 8.7 - 26.5 GHz with waveguide chirpedpulse Fourier transform microwave spectroscopy (CP-FTMW). Ethyl cyanoformate has been studied previously by Suenram, True, and Bohn in a Stark modulation cell. 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. Our high resolution spectra of a thermalized sample of ethyl cyanoformate at 261 K show contributions from syn-anti and 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.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Genre of Resource

Conference Paper / Presentation

Language

eng

Permalink

http://hdl.handle.net/2142/100643

DOI

10.15278/isms.2018.TD02

Copyright and License Information

Copyright 2018 J.H. Westerfield

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