Overview of binding studies performed between 1 and ⁺N(n-Bu)₄ salts in CD₂Cl₂ with 5% DMSO-d₆.

Entry	An.	K a (M−1) for 12A	Goodness of fit (r2)	K a 1 : 1 (M−1)	K a 1 : 2 (M−1)	Goodness of fit (r2)
				for 1
1	Cl−	414	0.9979	—
2	Br−	169	0.9982	—
3	I−	74	0.9942	—
4	N3−	193	0.9887	—
5	AcO−	15	0.9777	—
6	NO3−	—		91.960	2.484	0.9976
7	ClO4−	—		6.102	33	0.9941
8	BF4−	—		4.141	24	0.9965
9	PF6−	—		—