DELSC — Specify the effective molecular radius of the desired solvent.
DELSC=n.n
DELSC is the radial distance in Angstroms between the surface accessible to the centers of solvent molecules and the surface accessible to solvent charges. By default, DELSC is the same as RSOLV but it may be explicitly set to n.n using this keyword. The allowed values are 0.1 Angs < DELSC < RSOLV + 0.5 Angstroms. See Chapter 13, COSMO Solvation Model for more details.