Fig. 6: VCD spectra of chiral hosts and chiral host–guest complexes.

a VCD spectra of S_p-(R,R)-2 (purple line) and R_p-(S,S)-2 (green line) and of the complexes between S_p-(R,R)-2 and (S,S)-6 (purple dotted line), and R_p-(S,S)-2 and (R,R)-6 (green dotted line). b IR spectra of these hosts and host–guest complexes. Solvent CDCl₃. c Calculated conformation of the host S_p-(R,R)-2 (A) and of the complex S_p-(R,R)-2/(M)-(S,S)-6. d Calculated VCD spectra of the retained conformation A of the host S_p-(R,R)-2 (blue line and blue bars: rotational strengths), and of the conformation B of the complex S_p-(R,R)-2/(M)-(S,S)-6 (red-brown line and red-brown bars: rotational strengths).