Toward the limits of complexity of interstellar chemistry: Rotational spectroscopy and astronomical search for n- and i-butanal

@article{SanzNovo2022TowardTL,
  title={Toward the limits of complexity of interstellar chemistry: Rotational spectroscopy and astronomical search for n- and i-butanal},
  author={Miguel Sanz‐Novo and Arnaud Belloche and V{\'i}ctor M. Rivilla and Robin T. Garrod and Jos{\'e} Luis Alonso and Pilar Redondo and Carmen Barrientos and Lucie Kolesnikov{\'a} and Juan Carlos Valle and Lucas F. Rodr{\'i}guez-Almeida and Izaskun J{\'i}menez-Serra and Jes{\'u}s Mart{\'i}n-Pintado and Holger S. P. Muller and Karl M. Menten},
  journal={Astronomy \& Astrophysics},
  year={2022}
}
Context. In recent times, large organic molecules of exceptional complexity have been found in diverse regions of the interstellar medium. Aims. In this context, we aim to provide accurate frequencies of the ground vibrational state of two key aliphatic aldehydes, n-butanal and its branched-chain isomer, i-butanal, to enable their eventual detection in the interstellar medium. We also want to test the level of complexity that interstellar chemistry can reach in regions of star formation… 

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