Bugs item #3526933, was opened at 2012-05-15 07:24
Message generated for change (Tracker Item Submitted) made by baoilleach
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Category: Stereochemistry
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Noel O'Boyle (baoilleach)
Assigned to: Nobody/Anonymous (nobody)
Summary: Stereo lost at tet N due to N=O marked as sp2

Initial Comment:
A tetrahedral nitrogen can be a chiral centre. However, if the [N+][O-] is 
written as N=O, all of a sudden stereo is lost..

>obabel -:Br[N@@+](Cl)(I)[O-] -osmi -b
Br[N@@](=O)(Cl)I

>obabel -:Br[N@@+](Cl)(I)[O-] -osmi -b | obabel -ismi -osmi
BrN(=O)(Cl)I

The reason is that the N is marked as sp2, whereas it actually isn't. So I 
think this should be solved in atom-typing or so...

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