Dear Gromacs users,<br> <br> I am using Gromacs vs 3.3.3 on Open Suse LInux with ffG43a1 force field. My molecule contain aromatic carbon-chlorine bond, and i want to assign bond type for this but there is no entry in ffG43a1bon.itp correspond to aromatic carbon-chlorine bond. I got Force constant and Bond Length values(0.173000 and 2.9288e+06) for this bond by PRODRG2.5 Beta server. Can anyone help me how to add new Bond Type in ffG43a1bon.itp<br>
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-- <br>Regard<br>Anoop Dimri<br>Dept. Of Pharmacoinformatics<br>NIPER-Kolkata<br>India<br><br>