Hi Oliv,

I'm sorry, I think you will need to edit the output file from Sketcher ****_mon_lib.cif - the torsions section ( _chem_comp_tor) will have something like

test  CONST_1  C1  C2 C3 C4 180.0  0.0 0

the 180 needs changing to 0.0.
I think that is all you need to do - no doubt someone will correct me if I'm wrong!

Liz


On 15 Jun 2009, at 04:35, Oliv Eidam wrote:

Hi,

Could somebody explain how to sketch cis double bonds with Sketcher?
For example a cis-but-2-ene?

No matter how I draw the the molecule: When I create a library description I always get the trans double bond. I hope there is way to this through the Sketcher GUI, because I prefer not to edit the angles by hand...

Many thanks,

  Oliv


--
Oliv Eidam, Ph.D.
Postdoctoral fellow

University of California, San Francisco
Dept. of Pharmaceutical Chemistry
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