Dear Marcus, I want to use the TraPPE-EH force field for N2. In TraPPE-EH towhee file, how N2 parameters are used as per J. Potoff; J. I. Siepmann; "Vapor-Liquid Equilibria of Mixtures Containing Alkanes, Carbon Dioxide, and Nitrogen", AIChE J. 47 1676-1682 (2001). Is there any formula used for parameters in the file? Kindly please help me regarding the same. Awaiting your reply. Regards, Aparna