Fig. 13. Optimized M and P geometries and their relative stabilities of inward- (i) and outward-facing (o) conformers for (R)-oP⁴(o-^tBu) (left) and (S)-oP⁴(o-Bo) (right) (PCM(CHCl₃/B97-D/TZV(2d,2p))). Boxes indicate the favored conformers for each imine orientation.