Table 3. Binding Constant K and Maximum Effective Charge N Were Obtained from the Data in Figure 4.

	K (M–1)	N	ΔGa (kJ/mol)
SCN–	6.7 ± 3.0	7.9 ± 1.4	–4.6
ClO4–	7.3 ± 2.1	5.4 ± 0.6	–4.8
I–	8.0 ± 2.9	5.7 ± 0.6	–5.1
Cl–	4.7 ± 4.3	2.7 ± 1.5	–3.8

^aΔG = −k_BT ln(K).