Fig. 3.

(A) Dexter coupling and the BE and DAE contributions to the couplings for linear alkanes (Fig. 2A) as a function of bridge length. (B) Same structures as in A, where the average energy gaps $\text{aver}\left(F_{b_n^{\mathrm{\ast }},b_n^{\mathrm{\ast }}}\right)-F_{d\ast ,d\ast }$ and $F_{d,d}-\text{aver}\left(F_{b_n,b_n}\right)$ are lowered.