Geometry and electric dipole moment of the most stable conformer of glycinamide, and their orientation in the principal rotational axis frame. The dipole moment vector is confined to the ab inertial plane, and is drawn from the notional negative to the notional positive charge. The molecule has a planar amido N_aH₂ group, and a pyramidal amino N_tH₂ group. The geometry is non-planar with a small ~100 cm⁻¹ barrier at the C_s-symmetry configuration, where all heavy atoms are in the same plane, which also bisects the CH₂ and N_tH₂ groups. Tunnelling across the barrier between the two equivalent non-planar configurations leads to appreciable splitting into pairs ofall vibrational states, including the ground state.