Hi, I just discovered that the atomic number of hydrogen atoms is null in the CDK.
After I load a simple benzene molecules (or any others), with atom types configured, hydrogens added and converted to explicit, and aromaticity detected, the following snippet: for(int i = 0 ; i < iac.getAtomCount() ; i++) { IAtom a = iac.getAtom(i) ; System.out.println("Atom "+i+"/"+ iac.getAtomCount()+": "+a.getAtomTypeName()+" "+a.getAtomicNumber()); } Gives Atom 0/12: C.sp2 6 Atom 1/12: C.sp2 6 Atom 2/12: C.sp2 6 Atom 3/12: C.sp2 6 Atom 4/12: C.sp2 6 Atom 5/12: C.sp2 6 Atom 6/12: H null Atom 7/12: H null Atom 8/12: H null Atom 9/12: H null Atom 10/12: H null Atom 11/12: H null Don't know if its a known issue... Anyway it does not seems normal :) Cheers Vincent ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Cdk-user mailing list Cdk-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/cdk-user