position variable atom

How do I indicate position variation atom (not bond) using marvin sketch?

Hi Matt,

 

I am sorry to say, but we don't have such a thing as "position variation atom". Did you mean atom list https://docs.chemaxon.com/display/marvinsketch/Atom+List+and+NOT+List 

or any atom 

https://docs.chemaxon.com/display/marvinsketch/Generic+Query+Atom

 

Could you describe what would be the functionality expected from "position variation atom"? Maybe we have something similar... ;)

Please see attachment.  I could do a substructure query 3 times drawing out the nitrogen at the ortho, meta and para positions but how would I do this in a single query.  Using the atom list in this case would return records where the nitrogen is present more than once (ortho, meta, para).

Hi Matt,

In this specific case you can change the roles and attach the Cl atom with a position variation bond the pyridine ring.

Otherwise (e.g. non-symmetric ring) you may  define the changing part (e.g. the ring) as an R-group with 3 possible substituents drawn.

Best regards,

Szilard