Figure 1. The conformers (EQ0#, EQ0I, EQ0II, EQ0III, EQ0IV ) of Leucine and stereo-isomeric species (EQ1R1, EQ1R2a, EQ2R2a, EQ1R2b, EQ1R3a, EQ2R3, EQ1R4) predicted along the gas-phase stereoinversion pathways of Leucine [Ref. 10]. The labelling of various species corresponds to the pathways (for details see Ref. 10) The geometries depicted are optimized at DFT/B3LYP-D3(BJ)/cc-pVTZ level of the theory. The dashed line represents the hydrogen bonding interactions (with atomic distances in Å).