Maybe a "Highlight dodgy valences using halos" would be a useful engine...
On 21 December 2011 18:50, Geoff Hutchison <ge...@geoffhutchison.net> wrote: >> As we teach our students that oxygen has a valence of 2, it is annoying >> that they can make a molecule where it has four chemical bonds ;o(( > > Let me be clear that the hydrogen on the oxygen is a bug. > >> Is it not possible to provide an option to compel compliance with the >> rules of valence ? > > Using the "auto-adjust hydrogens" is the most effective way to do this. It's > very hard to truly "compel" compliance in a free-form draw tool like Avogadro > uses. Spartan, for example, compels compliance because atoms and bonds only > fit together in certain ways (e.g., an sp2-carbon can only make one double > bond). > > But a perfectly legitimate description of carbon monoxide has a triple bond > between C#O. > > -Geoff > ------------------------------------------------------------------------------ > Write once. Port to many. > Get the SDK and tools to simplify cross-platform app development. Create > new or port existing apps to sell to consumers worldwide. Explore the > Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join > http://p.sf.net/sfu/intel-appdev > _______________________________________________ > Avogadro-Discuss mailing list > Avogadro-Discuss@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/avogadro-discuss ------------------------------------------------------------------------------ Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev _______________________________________________ Avogadro-Discuss mailing list Avogadro-Discuss@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/avogadro-discuss
