Fig. 8. Re–Re HEI from NEB-CI calculations resulting in (S,R) stereoisomers. For A, the stacking occurs over the cyclohexene ring, whereas for B it forms over the pyrrolidine ring. The C–C bond being formed is perpendicular to the sheet and marked with a circle. The paperchain representation showcases the ring puckering conformation, with the red color representing the planar aromatic ring and colors yellow, green and blue represent distinct ring puckering. See original reference for additional information.
