Given an atom in a molecule, how do I know whether it is aliphatic/aromatic? I know that stuff like benzene becomes more stable due to delocalized pi-bonds and is thus called ‘aromatic’.
But from a molecular graph perspective, given a bunch of atoms connected together how do I know whether a node is aliphatic/aromatic?
rajarshi guha [ Editor ] from Bethesda, United States of America
You’d need to perceive aromaticity, after which individual atoms/bonds can be identified as aromatic or non-aormatic. See http://www.dalkescientific.com/writings/diary/archive/2007/11/30/opensmilesandaromaticity.html for a discussion