Biology
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.496..145k&link_type=abstract
In: Exo-/astro-biology. Proceedings of the First European Workshop, 21 - 23 May 2001, ESRIN, Frascati, Italy. Eds.: P. Ehrenfreu
Biology
7
Astrobiology, Origin Of Life, Earth
Scientific paper
Crossed beam experiments of cyano CN(X2Σ+) and ethynyl C2H(X2Σ+) radicals with unsaturated hydrocarbons acetylene, ethylene, methylacetylene, and benzene have been performed to investigate synthetic routes to form nitriles, polyynes, and substituted allenes in hydrocarbon-rich atmospheres of planets and their moons. All radical reactions proceed without entrance barrier, have exit barriers well below the energy of the reactant molecules, and are strongly exothermic. The predominant identification of the radical versus atomic hydrogen exchange channel makes these reactions compelling candidates to form complex organic chemicals - precursors to biologically important amino acids - in solar system environments.
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