Fig. 6. Under applied force, cis- and trans-gDFC open to the same s/trans-s/trans 1,3-diradical, which is a minimum on the force-modified potential energy surface,22 at f* ∼ 1290 pN and f* ∼ 1820 pN on the ∼0.1 s time scale of an SMFS experiment, respectively.37 When force is removed, the 1,3-diradical becomes a transition state for the disrotatory inversion path from trans- to cis-gDFC.
