[gmx-users] Rychaert-Belleman's dihedral

Rongliang Wu wurl04 at iccas.ac.cn
Tue Mar 14 01:38:12 CET 2006

hello all,
 i'm using the opls force field to simulate a system of molecules with benzene ring, i found the default dihedral fun is 3(Rychaert-Belleman's dihedral), and do i have to add those dihedrals in the benzene to the [ impropers ] so as to insure the atoms are in a plane? or can the "fun 3" keep the stoms of the benzene within the plane? is it necessary to use Rychaert-Belleman's dihedral for the oplsaa force filed?

Rongliang Wu

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