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Infrared spectra of butenyl anions: multiphoton electron detachment as a photochemical probe of isomeric structures of gas phase anions

Wight, Charles A. and Beauchamp, J. L. (1990) Infrared spectra of butenyl anions: multiphoton electron detachment as a photochemical probe of isomeric structures of gas phase anions. International Journal of Mass Spectrometry and Ion Processes, 100 . pp. 445-455. ISSN 0168-1176. https://resolver.caltech.edu/CaltechAUTHORS:20180702-093426315

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Abstract

The techniques of ion cyclotron resonance spectroscopy have been used to examine IR multiphoton electron detachment reactions of C_4H−_7 structural isomers and stereoisomers. Anions are trapped at low pressure for up to several seconds during irradiation with the unfocused output of a line-tunable continuous wave CO_2 laser. By examining photodetachment yields as a function of laser wavelength and irradiation period it is possible to distinguish three different isomers. Deprotonation of cis-2-butene by NH−_2 and H− forms exclusively the cis-1-methylallyl anion whereas deprotonation of trans-2-butene or 1-butene yields a mixture of the cis and trans anions. The third isomer, 2-methylallyl anion, results from deprotonation of 2-methylpropene. IR multiphoton electron detachment spectra in the 10 μm region are presented for these anions and isomeric mixtures.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/0168-1176(90)85087-IDOIArticle
ORCID:
AuthorORCID
Beauchamp, J. L.0000-0001-8839-4822
Additional Information:© 1990 Published by Elsevier B.V. Received 13 March 1990. We thank D. Duan for checking the purity of our butene samples by vapor phase chromatography. These studies were supported in part by the President’s Fund of the California Institute of Technology, the U.S. Department of Energy and the National Science Foundation (Grant No. CHE 87-11567).
Funders:
Funding AgencyGrant Number
Caltech President’s FundUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFCHE 87-11567
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Caltech Arthur Amos Noyes Laboratory of Chemical Physics6553
Record Number:CaltechAUTHORS:20180702-093426315
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180702-093426315
Official Citation:Charles A. Wight, J.L. Beauchamp, Infrared spectra of butenyl anions: multiphoton electron detachment as a photochemical probe of isomeric structures of gas phase anions, International Journal of Mass Spectrometry and Ion Processes, Volume 100, 1990, Pages 445-455, ISSN 0168-1176, https://doi.org/10.1016/0168-1176(90)85087-I. (http://www.sciencedirect.com/science/article/pii/016811769085087I)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87510
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:03 Jul 2018 18:14
Last Modified:03 Oct 2019 19:56

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