Figure 1.

Chemical structure and side view of the X‐ray crystal structure of (a) TCC2‐R and (b) TCC3‐R.10 The cyclohexane groups are shown in red; other C, grey; N, blue; H omitted for clarity in the crystal structure representation. The green arrows indicate fast molecular rotation of the para‐phenylene. The ¹³C spin‐lattice relaxation times (T₁) obtained for selected carbons are given in the Figure, including T₁ values after iodine loading (values in parentheses). The deuterium‐labelled positions on the para‐phenylene are also shown for [D₁₂]TCC2‐R and [D₁₂]TCC3‐R.