. 2014 Dec 5;137(1):499–507. doi: 10.1021/ja511648d

Table 2. Association Constants, K_a (m^–1)^a for 9·PF₆.

	K_a (m^–1)
anion	HB catenane⁶⁴^,^b	9·PF₆
Cl^–	680(20)	1850(224)
Br^–	630(50)	>10⁴
I^–	510(10)	>10⁴
OAc^–	–^c	NB^d
H₂PO₄^–	49(4)	NB^d

Calculated using WinEQNMR2⁶⁸ monitoring the internal pyridinium proton; estimated standard errors given in parentheses (293 K, solvent: 10:45:45 D₂O/CDCl/CD₃OD).

1:1 CDCl₃/CD₃OD, 298 K.

Not conducted.

NB: No binding: Δδ < 0.07 ppm.

Table 2. Association Constants, Ka (m–1)a for 9·PF6.

Table 2. Association Constants, K_a (m^–1)^a for 9·PF₆.