Re: [Rdkit-discuss] UFF and MMFF conformers energy

2017-02-09 Thread Paolo Tosco
Dear Méliné, if you wish to keep input hydrogens you need to add a "removeHs = False" parameter to Chem.SDMolSupplier(); hydrogens are removed by default. As Peter pointed out, the original coordinates may give large energy values just because of small deviations from ideal values of bond

Re: [Rdkit-discuss] UFF and MMFF conformers energy

2017-02-09 Thread Peter S. Shenkin
Small atomic displacements can cause large forcefield energy differences. Computing molecular-mechanics energies from exactly the same coordinates using two different force-fields is probably not a reasonable procedure. It would be better to do an energy minimization with the two force fields

[Rdkit-discuss] UFF and MMFF conformers energy

2017-02-09 Thread Méliné Simsir
Dear all, I'm still a beginner with Rdkit, and I’m having a hard time calculating the energy of conformers. I think I have read all the topics on the subject, but I might have missed something. Here is a shorten version of a code I wrote thanks to all the information I could find here. from