[gmx-users] problem in ngmx

[Marc F. Lensink]

On Wed, Jun 17, 2009 at 06:57:24AM -0400, Justin A. Lemkul wrote:
>
> The .mdp file seems reasonable.  QM charges are not necessarily the end 
> result in Gromos parameterization.  In fact, such calculations are often 
> unnecessary. In my experience, assigning charges based on functional groups 
> already present in the force field is often a reasonable starting point.  
> But in any case, you must always verify your results and, in the end, 
> follow the same parameterization scheme as the original force field (which, 
> in the case of the Gromos force fields, does not include QM charge 
> calculations).

I've run hundreds of QM charge calculations.  in many cases, they are
remarkably similar to the gromos charges...

cheers,
marc