Laboratory Evidence for Solid-Phase Protonation of HNCO in Interstellar Ices

Details Laboratory Evidence for Solid-Phase Protonation of HNCO in Interstellar Ices Laboratory Evidence for Solid-Phase Protonation of HNCO in Interstellar Ices

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apjs..159..277h&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 159, Issue 2, pp. 277-281.

Astronomy and Astrophysics

Astronomy

2

Astrochemistry, Infrared: Ism, Ism: Clouds, Ism: Molecules, Methods: Laboratory, Molecular Processes

Scientific paper

A recent study reported production of amino formate, HC(O)ONH2 on warming a solid-phase HNCO+HCl+H2O mixture. Here we reinterpret those results and suggest that the synthesis of amino formate is unlikely and that what was actually observed was the production of ClC(O)NH2 by a low-temperature, solid-phase acid-base reaction. The published infrared spectra are reexamined and are in full agreement with ClC(O)NH2. This new interpretation also agrees with chemical expectations, previous laboratory work, and new density-functional calculations. A number of acid-base pairs are already known in the interstellar medium, and our new interpretation of HNCO+HCl+H2O chemistry suggests that the H2NCO+ cation is probably interstellar as well.

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