Table 1.

Comparison of the activation energy barriers (E _a) and rotational rates at 230 K (k _230K) for all the TCC cages investigated.

Tubular covalent cages	E a [kJ mol−1][a]	k 230 [K Hz−1]
[D12]TCC2‐R	18 (18–20)	1.2×106
iodine‐loaded [D12]TCC2‐R	21 (15–21)	1×105
[D12]TCC3‐R	12 (10–13)	8×106
iodine‐loaded [D12]TCC3‐R	21 (14–21)	5×104

[a] Range of E _a values estimated from errors in the values of k are given in brackets.