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Use this tag for questions relating to organic molecules and their properties (structure of organic molecules, spectroscopic properties, reaction mechanisms, stereochemistry etc). DO NOT use this tag as the only tag in your question, as this tag by itself cannot appropriately classify your question. Always use this tag in addition to other more specific tags.

2 votes
1 answer
52 views

What does ‘S/A’ mean in SMARTS pattern when using Chemicalize to draw the chemical structure?

I am still new to the SMARTS annotation. I am wondering what does S/A’ mean on the bond labeling drawn with Chemicalize using SMARTS [!#1]c1n[cH]nc([!#1])c1[!#1]? Does it mean “single or aromatic quer …
tassaneel's user avatar
  • 131
3 votes
1 answer
201 views

What does ‘(A)’ mean in SMARTS pattern when using Chemicalize to draw the chemical structure?

I am not quite sure what ‘(A)’ could mean for the carbon atom when writing the SMARTS CCN(C)C using Chemicalize to draw the chemical structure below. Can anyone help?
tassaneel's user avatar
  • 131