. Author manuscript; available in PMC: 2009 Oct 5.

Published in final edited form as: J Phys Chem B. 2008 Jul 16;112(31):9428–9436. doi: 10.1021/jp800816a

Table 3.

Solubility free energy increments (SFEI)^f characterizing effects of Hofmeister salts on solubilty of the peptide AG₄E and salt partition coefficients for total surface $(K_{p}^{o b s})$ and polar amide surface $(K_{p}^{p a})$ ^g obtained from those SFEI.

salt	SFEI	$(K_{p}^{o b s})$	$K_{p}^{p a}$
Na₂SO₄	709	0.69	2.22
KF	314	0.85	1.67
NaCl	68.2	0.97	1.71
KCl	68.2	0.97	1.66
LiCl	13.6	0.99	1.59
NaBr	0.00	1.00	1.56
NaI	−300	1.13	1.73
GuHCl	−351	1.19	1.68
NaSCN	−354	1.16	1.74
NaClO₄	−436	1.21	2.11

The SFEI are calculated from the reported Setschenow coefficients⁷ and are in units of cal mol⁻¹ molar⁻¹.

The polar amide contribution $K_{p}^{p a}$ is calculated from Eq. 3 and the ethyl acetate data presented in Table S2, which also contains the corresponding information for the other members of the gycyl peptide series.