Figure 3.

Arrhenius plot of the rotational rates, k, of the para‐phenylene ring in desolvated and iodine‐loaded [D₁₂]TCC2‐R and [D₁₂]TCC3‐R molecular rotor cages. The lines show the linear fit to the Arrhenius equation with the extracted values being reported in Table 1. Error bars are estimated from comparison of the ²H NMR line shape fit at various rotational rates. The errors associated with the 154 K rates for iodine‐loaded [D₁₂]TCC2‐R and [D₁₂]TCC3‐R are due to the indistinguishable line shape between 1 and 9 kHz. The ²H NMR rotational rates obtained at 230 K from the iodine released [D₁₂]TCC2‐R and [D₁₂]TCC3‐R cages are also shown in empty circles.