Re: [Rdkit-discuss] difference in VdW radii between Open Babel 2.3.2 and rdkit 201503

2017-06-19 Thread Greg Landrum
Francois, There is not a direct unambiguous physical observable that one can point to that defines a van der Waals radius; they are looked up in tables. The RDKit and OpenBabel are clearly using different tables. As to which to use: there isn't really an answer to the question; it comes down to

[Rdkit-discuss] difference in VdW radii between Open Babel 2.3.2 and rdkit 201503

2017-06-18 Thread Francois BERENGER
Hello, Sometimes, as a computer scientist, I am quite worried by chemical software libraries: $ cat data/ethanol.pqr COMPNDethanol AUTHORGENERATED BY OPEN BABEL 2.3.2 HETATM1 C LIG 1 -0.017 -0.601 0.000 0.04138432 1.700 C HETATM2 C LIG 1 1.247