Conformers of n-propanol (n-C₃H₇OH) represented as a function of relative energy. The two lowest-energy conformers are the Ga and Aa conform-ers, which have been detected towards G+0.693 (see Sect. 3.1). The x-axis is not to scale for visualisation purposes. The relative energies of the different conformers of n-propanol are E = 0 K for Ga, E = 40.3 K for Aa, E = 64.7 K for Ag, E = 68.8 K for Gg, and E = 73.2 K for Gg′ (see also Sect. 3.1).