Hi Stefano,
the problem with the PDBQT format is that connectivity is implicit and bond 
order is lost.
If your atom coordinates are close to ideal (i.e., bond lengths are optimal, 
non-distorted) you have a good chance of OB to be able to re-build the correct 
bond order.
Although, there's been some discussion in the mailing list about similar 
problems using PDB files as well.
My advice is to manually correct the issues, hoping you don't have too many 
files to process.

Best,

S

--

 Stefano Forli, PhD

 Assistant Professor of Integrative
 Structural and Computational Biology,
 Molecular Graphics Laboratory

 Dept. of Integrative Structural
  and Computational Biology, MB-112F
 The Scripps Research Institute
 10550  North Torrey Pines Road
 La Jolla,  CA 92037-1000,  USA.

    tel: +1 (858)784-2055
    fax: +1 (858)784-2860
    email: fo...@scripps.edu
    http://www.scripps.edu/~forli/
________________________________________
From: Stefano Guglielmo [stefano.guglie...@unito.it]
Sent: Monday, January 04, 2016 4:12 PM
To: openbabel-discuss@lists.sourceforge.net
Subject: [Open Babel] azoxy

Dear opnebabel users,

I've made docking with autodock of some molecules containing an azoxy function; 
I need to generate sdf file from pdbqt, but openbabel seems to manage the 
molecules not so well as it adds hydrogens to the azoxy group.
Any suggestion about generating a correct sdf file?

Thanks a lot

--
Stefano GUGLIELMO PhD
Assistant Professor of Medicinal Chemistry
Department of Drug Science and Technology
Via P. Giuria 9
10125 Turin, ITALY
ph. +39 (0)11 6707678

________________________________


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