Try virtual sites constructions.

On Feb 11, 2013, at 6:01 PM, Rasoul Nasiri wrote:

Dear All,

I need to define interaction sites on the center of C-H bonds instead
of nuclei of each atom. The main reason was that non-bonding
parameters (sigma and epsilon) have been parametrized in these centers
and those are only available for the center of C-H.


So, I just wanted to know how calculation of force can be implemented
by GROMACS in this case.



Best wishes
Rasoul
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