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Carbon dioxide chemistry at low temperatures

Hodyss, Robert and Piao, Sophie and Cable, Morgan L. and Malaska, Michael J. (2017) Carbon dioxide chemistry at low temperatures. In: 253rd American Chemical Society National Meeting & Exposition, April 2-6, 2017, San Francisco, CA.

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We show that the reaction of carbon dioxide with primary and secondary amines can lead to oxygenated orgs. at low temps. without the need for external energy input, via the carbamation reaction: R-NH_2 + CO_2 → R-NHCOOH. Using a combination of micro-Raman spectroscopy and UHV FTIR spectroscopy, we examine the reaction products and kinetics of the carbamation reaction for a variety of primary and secondary amines. We have obsd. carbamic acid formation in mixts. of methylamine, ethylamine, dimethylamine and pyrrolidine with CO_2 at cryogenic temps. This indicates that both primary and secondary amines can undergo carbamation at low temps. Reaction was obsd. with methylamine as low as 40 K, and with ethylamine at 100 K. These temps. are low enough to enable this reaction to occur on a variety of Solar System bodies where CO_2 and amines may be present in surface ices, such as Titan, Triton, Pluto and comets. We will present data on the kinetics of the carbamation reaction for a variety of amines, as well as ests. of the quantity of carbamic acids that may be produced on Titan's surface and in the atm.

Item Type:Conference or Workshop Item (Paper)
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URLURL TypeDescription Website
Hodyss, Robert0000-0002-6523-3660
Cable, Morgan L.0000-0002-3680-302X
Additional Information:© 2017 American Chemical Society.
Record Number:CaltechAUTHORS:20170502-103125271
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77124
Deposited By: Tony Diaz
Deposited On:02 May 2017 17:46
Last Modified:09 Mar 2020 13:18

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