Figure 17.

Leigh's conversion of achiral rotaxane 27 into rotaxane 29 that possesses point mechanical chirality. The asterisks mark the stereocentre in rotaxane 29, which may be assigned according to standard CIP rules.

Leigh's conversion of achiral rotaxane 27 into rotaxane 29 that possesses point mechanical chirality. The asterisks mark the stereocentre in rotaxane 29, which may be assigned according to standard CIP rules.