Hello everybody, I have two benzene molecules and I want to restrain them only by their center of mass. The conversation below (between Shirts and Spoel) gave me some ideas but still I couldnt solve the problem. In particular I'm not seeing any way to create this user group, nor how to calculate its center of mass. Could someone give me a hand with that? Bests eef _______________________________________ Eudes Eterno Fileti Centro de Ciências Naturais e Humanas Universidade Federal do ABC — CCNH Av. dos Estados, 5001 Santo André - SP - Brasil CEP 09210-971 +55.11.4996-0196 http://fileti.ufabc.edu.br
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