free energy question. Problem with my result!!!!

[Randal Henne]

Isn't that part of the definition a Lennard-Jones potential: that
the zero-point of the interaction energy is defined at infinite
separation?  It seems to me that your calculation is simply 
giving you back your model's boundary condition.

-- 
|   ___                     _                 | henne at u.washington.edu   |
|  (/__) _   _   _ /       (/_/ _  _   _   _  | Randy Henne              |
|  /  ) (_\ / ) (_/  (_)   / / (- / ) / ) (-  | Molecular Bioengineering |
|                     )                       | University of Washington |