Dear Haider Abbas, Sorry, Chimera does not do that type of calculation. You have to use some other program. Regards, Elaine ---------- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco On Dec 31, 2013, at 9:21 PM, Haider Abbas <haiderabbasphy@gmail.com> wrote:

Dear all user,

Could you please let me know how to calculate reaction rate of a barrierless chemical reaction in gas phase by chimera.

with regards Haider Abbas