When we met in Cologne last August, Egon and I agreed that Jmol -- at 
least in our hands -- won't be in the business of doing quantum chem or 
molecular mechanics calculations. Of course, anyone who wants can 
implement whatever they can with Jmol, but we are more interested, as 
Angel describes, in Jmol being a full-service viewer.

The calculations that I introduced last summer and fall in relation to 
crystallographic symmetry and space groups and orbitals are all for the 
service of molecular visualization. As Angel points out, I did a bit of 
experimentation with "sprouting" hydrogens because I thought that 
molecular surfaces probably could benefit from that. I was mildly amused 
to find how MINIMAL the difference was -- it turns out that hydrogen 
atoms in general are little more than bumps on the overall atomic van 
der Waals surface. Anyway, this is implemented for carbon, at least, and 
it is even possible to get the coordinates for small sets, since the 
JVXL files are saved with (I think) up to 50 or 100 coordinates, but any 
such rendering is crude. There are obvious ambiguities: X--O (where is 
the OH?) , RCCC (Is this propyl or propenyl?), and R-C-O (Is that an 
alcohol or an aldehyde?).

So right now we don't support the addition or deletion of atoms, 
hydrogen or otherwise.

I apreciate these replies, Angel, as it appears this list is being 
blocked, and I never see the original messages. Please don't assume I'm 
ignoring messages. I'll see if it is St. Olaf that is blocking these. I 
know we've had mega spam problems -- as has everyone -- lately.


Bob



Angel Herraez wrote:

>I am opening two new threads for Paul questions in his last post to "
>loading jmol file from open babel"
>
>On 29 Jan 2007 at 10:44, H. Paul Benton wrote:
>  
>
>> To all the other uses I have one more question to ask 
>>"If a file was loaded with no Hydrogens how can I get 
>>Jmol to put them on?".
>>    
>>
>
>Jmol cannot add hydrogens right now. Remebre it is a viewer, not a molecule 
>builder.
>I can recommend two programs that allow you to do so. One is Discovery Studio 
>Visualizer, 
>from Accelrys (formerly known by several names such as WebLab Viewer, Accelrys 
>Viewer, 
>DS Viewer, etc.)
>The other is ChemSketch, from ACDLabs. This is actually a 2D chemical drawing 
>package, 
>but imports and exports MOL files and has a 3D module. 
>
>If you haven't used any of them, go for DS Visualizer. It will open your pdb, 
>mol, xyz etc files, 
>then go to menu Tools > Hydrgens > Add and save again.
>
>
>
>
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