Thermodynamic models of the distribution of life-related organic molecules in the interstellar medium

Dolomatov, M. Yu.; Zhuravleva, N. A.

doi:10.1007/s10509-014-1844-8

Cited by 2 publications

(3 citation statements)

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“…The first criterion of viability that was applied consists on identifying which reactions are exergonic within the whole range of temperatures and pressures. The importance of gathering thermochemical data for reactions in the ISM has been previously pointed out . Such data can be unambiguously obtained since their calculation do not require a previous knowledge of every elementary steps involved in a global process.…”

Section: Resultsmentioning

confidence: 99%

“…The importance of gathering thermochemical data for reactions in the ISM has been previously pointed out. 14 Such data can be unambiguously obtained since their calculation do not require a previous knowledge of every elementary steps involved in a global process. The obtained data are shown in Figure 2, while the corresponding individual ΔG values are provided as Supporting Information in Tables S1−S12.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…More than 150 species have been identified, to date, in molecular clouds, being H 2 the most abundant by far. On the other hand, some of the organic molecules present in the ISM may be considered as precursors of prebiotic molecules (PBM). ,− Since it is assumed that PBM were created from simpler precursors, the chemical processes leading to the formation of such precursors are of particular interest. Different chemical routes toward molecular complexity have been proposed ,,, with the most widely accepted consisting of chain ion-neutral reactions leading to larger polyatomic species, which eventually react with electrons yielding neutral species by dissociative recombination …”

Section: Introductionmentioning

confidence: 99%

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Systematic Search for Chemical Reactions in Gas Phase Contributing to Methanol Formation in Interstellar Space

Gámez

Galano

2017

J. Phys. Chem. A

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A massive search for chemical routes leading to methanol formation in gas phase has been conducted using computational chemistry, at the CBS-QB3 level of theory. The calculations were performed at five different temperatures (100, 80, 50, 20, and 10 K) and at three pressures (0.1, 0.01, and 0.001 atm) for each temperature. The search was focused on identifying reactions with the necessary features to be viable in the interstellar medium (ISM). A searching strategy was applied to that purpose, which allowed to reduce an initial set of 678 possible reactions to a subset of 11 chemical routes that are recommended, for the first time, as potential candidates for contributing to methanol formation in the gas phase of the ISM. They are all barrier-less, and thus they are expected to take place at collision rates. Hopefully, including these reactions in the currently available models, for the gas-phase methanol formation in the ISM, would help improving the predicted fractional abundance of this molecule in dark clouds. Further investigations, especially those dealing with grain chemistry and electronic excited states, would be crucial to get a complete picture of the methanol formation in the ISM.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%