Re: [Open Babel] Molecule ' s Energy

2010-02-15 Thread Geoffrey Hutchison
> Then I recognized the OBFieldForce class (example used in the obenergy tool) > and I got rather large energy values in kJ/mol for molecules of at most 240 > amu. Finally I built in the energy minimizing step (using the > pFF->ConjugateGradients(1)), but only the energy values of small > m

Re: [Open Babel] Molecule ' s Energy

2010-02-15 Thread Chris Morley
People from various branches of chemistry have contributed to OpenBabel and the terms they use are not always compatible. If you were expecting numbers like Enthalpy of Formation of methane at 300K to be about -74.8 kJ/mol, and wanting to estimate that for any molecule (or even handle it), I am

Re: [Open Babel] Molecule ' s Energy

2010-02-15 Thread Noel O'Boyle
On 14 February 2010 19:10, Daniel Hoegerl wrote: > Hi everyone, > > I'll immediately start, so: > > I'm trying to calculate the gibbs energy of a molecule, and first found the > class OBMol and it's method "GetEnergy()". I'm creating the OBMol object from > a SMILES string. However, GetEnergy()

[Open Babel] Molecule ' s Energy

2010-02-15 Thread Daniel Hoegerl
Hi everyone, I'll immediately start, so: I'm trying to calculate the gibbs energy of a molecule, and first found the class OBMol and it's method "GetEnergy()". I'm creating the OBMol object from a SMILES string. However, GetEnergy() allways (well, I tried with a lot molecules) returns 0.0. Th