Table 2.

CPC Values for Positand 2 and Its Complex with Ada-CO₂⁻ Determined by Turbidity and DLS Assays^a

anion	CPCTurb (mM),b host 2	CPCDLS (mM),c host 2	CPCTurb (mM),b 2·Ada-CO2−	CPCDLS (mM),c 2·Ada-CO2−
PF6−	4.0	12	3.0	6.6
CF3SO3−	9.2	5.6	23	30
ReO4−	9.4	18	9.6	16
ClO4−	12	30	12	18
BH3CN−	19	30	19	27
BF4−	35	54	34	48
SCN−	63	72	65	96
I−	100	140	120	160
CCl3CO2−	110	100	d	200
Cl2CHCO2−	d	d	d	d
Br−	d	d	d	d
NO3−	d	d	d	d
Cl−	d	d	d	d
F−	d	d	d	d

^aTurbidity determinations were carried out in at least triplicate (errors (CV) < 10%). DLS determinations utilized four measurements on single samples.

^b0.5 mM 2 or its complex in 10 mM phosphate buffer (pH = 7.3).

^c2.0 mM 2 or its complex in 40 mM phosphate buffer (pH = 7.3).

^dNo observed precipitation.