Amides inventory towards the G+0.693−0.027 molecular cloud

ABSTRACT Interstellar amides have attracted significant attentions as they are potential precursors for a wide variety of organics essential to life. However, our current understanding their formation in space is heavily based on observations star-forming regions and hence the chemical networks lack constraints early origin. In this work, unbiased sensitive spectral surveys with IRAM 30 m Yebes 40 telescopes used systematically study number towards quiescent Galactic centre molecular cloud, G+0.693−0.027. We report first detection acetamide (CH3C(O)NH2) trans-N-methylformamide (CH3NHCHO) cloud. addition, wider frequency coverage survey, we revisited formamide (NH2CHO) urea (carbamide; NH2C(O)NH2), which had been reported previously Our results compared those present literature including recent laboratory experiments models. find constant abundance ratios independently evolutionary stages, suggesting that related chemistry triggered stages cloud remain unaffected by warm-up phase during star process. Although correlation between more complex NH2CHO suggested, alternative routes involving other such acetaldehyde (CH3CHO), methyl isocyanate (CH3NCO), methylamine (CH3NH2) may also contribute production amides. Observations together these species larger sample sources can help constrain amide interstellar medium.