problem with Dihedral

From: farzad kiani (farzad_kiani1364_at_yahoo.com)
Date: Sun Oct 06 2013 - 07:27:01 CDT

Hi I want to set Dihedral in force filed parameter file I don't know what should I set for n:multiplicity it is described as 2S+1 namd user guide says "The “multiplicity” n is typically 1, 2, or 3, although for a small number of cases two or three terms with different values of n are provided for the same atom types." I have a case two or three terms with different values of n are exist: SI   O    SI   O       -0.0100     ??     180.00 SI   O    SI   O       -0.2350     ??     180.00 does anyone know what should I do?

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