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Formation of interstellar cyanoacetamide: a rotational and computational study
M Sanz-Novo1,2, I León1, J L Alonso1
1Grupo de Espectroscopía Molecular (GEM), Edificio Quifima, Área de Química-Física, Laboratorios de Espectroscopía y Bioespectroscopía, Parque Científico UVa, Unidad Asociada CSIC, 47011 Valladolid, Spain.
Researchers explored the interstellar formation of protonated cyanoacetamide. They determined its microwave spectroscopic frequencies, aiding its potential detection in space.
Area of Science:
- Astrochemistry
- Computational Chemistry
- Spectroscopy
Background:
- Cyanoacetamide is a molecule containing a nitrile (-CN) group and an amide functional group.
- It is a target molecule for detection in the interstellar medium.
Purpose of the Study:
- To investigate a plausible interstellar formation pathway for protonated cyanoacetamide.
- To experimentally determine the microwave spectroscopic frequencies of neutral cyanoacetamide for interstellar identification.
Main Methods:
- High-level theoretical computations were used to model the formation process of protonated cyanoacetamide.
- Laser-ablation molecular beam Fourier transform spectroscopy was employed to measure the rotational frequencies of neutral cyanoacetamide.
Main Results:
- The first rotational characterization of cyanoacetamide is reported, with precise spectroscopic constants determined.
- Theoretical calculations revealed an exothermic, barrierless gas-phase reaction pathway for the formation of protonated cyanoacetamide from protonated hydroxylamine.
Conclusions:
- The study provides crucial spectroscopic data for identifying cyanoacetamide in the interstellar medium.
- A feasible formation route for protonated cyanoacetamide under interstellar conditions has been elucidated.
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