molecules:ism:hydroxypropenal

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molecules:ism:hydroxypropenal [2022/04/25 13:41] – muellermolecules:ism:hydroxypropenal [2022/04/25 15:47] (current) – mueller
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 **[[https://doi.org/10.1051/0004-6361/202243038|The ALMA-PILS survey: First Tentative Detection of 3-Hydroxypropenal (HOCHCHCHO) in the Interstellar Medium and Chemical Modeling of the C<sub>3</sub>H<sub>4</sub>O<sub>2</sub> Isomers]]**\\ **[[https://doi.org/10.1051/0004-6361/202243038|The ALMA-PILS survey: First Tentative Detection of 3-Hydroxypropenal (HOCHCHCHO) in the Interstellar Medium and Chemical Modeling of the C<sub>3</sub>H<sub>4</sub>O<sub>2</sub> Isomers]]**\\
 //Astron. Astrophys.// **660** (2022), Art. No. L6.\\  //Astron. Astrophys.// **660** (2022), Art. No. L6.\\ 
 +3-Hydroxypropenal is the enol form of malonaldehyde. This enolic form is more stable than the dial because of intermolecular hydogen bonding. The molecule was identified through 11 lines in Band 7 corresponding to 19 //b//-type rotational transitions. Some of these are fully or partially blended. Two additional lines were clearly detected in Band 6 data. Rotation-tunneling transitions of //a//-type symmetry may be observable for somewhat higher excitation temperatures. However, the rest frequencies of stronger ones with low values of //K<sub>a</sub>// are so uncertain that they can not be identified unambiguously. Its fractional abundance with respect to methanol is ~10<sup>−4</sup>.\\
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 +Contributor(s): H. S. P. Müller; 04, 2022
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