Fig. 9 The proposed most stable secondary structures of the Happy oligorotaxanes
Fig. 8 The three families of oligorotaxanes, exemplified by compounds derived from a
heptameric DNP thread. The rotaxanes’ moods depend on their adherence to a selection rule
forbidding CBPQT
4+ to occupy adjacent DNP sites. Whereas Confused rotaxanes can adopt
multiple stable translational isomers and Frustrated rotaxanes cannot obey the rule at all, Happy
rotaxanes express a single rule-compliant isomer
286
C.J. Bruns and J.F. Stoddart
Fig. 8 The three families of oligorotaxanes, exemplified by compounds derived from a
heptameric DNP thread. The rotaxanes’ moods depend on their adherence to a selection rule
forbidding CBPQT
4+ to occupy adjacent DNP sites. Whereas Confused rotaxanes can adopt
multiple stable translational isomers and Frustrated rotaxanes cannot obey the rule at all, Happy
rotaxanes express a single rule-compliant isomer
286
C.J. Bruns and J.F. Stoddart