Table 1.

Parameterization of Eq. 2 for four different interaction types.

Type	N	a	b	c	R2
Nonpolar	354	0.254	3.883	0.1907	0.85
Hydrogen bond	312	0.522	9.105	0.2847	0.89
Positively charged	44	0.983	29.35	0.4226	0.68
Negatively charged	63	1.57	29.28	0.3456	0.77