Their discussion considers aminooxirane, or 2-oxiranamine, which is chiral, and which they show lies 200 kJ mol -1 above acetamide, has a dipole moment of 1.0 D and an adsorption energy on water ice of 64.4 kJ mol -1 . Although none of these values by themselves render 2oxiranamine undetectable it makes it unlikely, unless of course precursor species are present in high abundance. Here it is found that 2-oxiranamine lies 182 kJ mol -1 above acetamide and has a dipole moment of 1.06 D, Tables .