We performed 1 H NMR and 1 H-15 N HSQC analyses of all P atropisomers with racemic mixtures and enantiopure 10CSA(S or R). For the racemic 10CSA solutions, as expected 1 H NMR spectra of P atropisomers remained isochronous (Figure ). Due to the chiral information transmitted in equal proportions from both chiral components (10CSA R and S), the observed inner core signals resonate in an identical manner to achiral acids (BSA and MSA) previously reported by us. One singlet is observed for αβαβ-Pꞏ10CSA, two in α4-Pꞏ10CSA, three signals of relative intensity 1:2:1 in α2β2-Pꞏ10CSA, and finally the spectrum for the unsymmetrical α3β-Pꞏ10CSA atropisomer has four differently shifted signals. The enantiopure solutions are described in the main text. ), while the split pyrrolic N-H were upfield shifted upon emerging at ~3 eq. of 10CSA(R) in the 1 H NMR spectra (Figures and). The magnitude of chemical shifts of split peaks (∆σ) drastically increased over the first ~7 eq., while the later additions resulted in marginal changes to ∆σ (Figure ). . H NMR of the 22-P N-H regions dependence to the 10CSA(R) equivalents, recorded in CD3CN. The addition of 12 eq. of TFA was to solubilize and protonate 22-P. Highlighted with red dot and star is two different splitting N-H resonance signals. Note, these spectra were recorded with higher concentrations of 22-P expecting to get a better resolution of the inner N-H. From the obtained spectra it appears that the inner core system of interest originates downfield shifted and overlays with the aliphatic CH3 region.