Table 1.

Rates of amide H/D exchange in 1

Rate constant	PEt4+⊂1	NMe4+⊂1	(D2O)n⊂1	PDLA*
logkD M−1⋅s−1	2.80 ± 0.03	3.81 ± 0.14	5.41 ± 0.04	0.0171
logkOD M−1⋅s−1	0.16 ± 0.02	1.15 ± 0.09	3.16 ± 0.04	8.48
logkW s−1	−3.62 ± 0.01	−2.84 ± 0.03	−2.25 ± 0.02	−3.04

^*Rate constants (298 K) for PDLA were calculated using Arrhenius parameters from ref. 44.