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Plzz help..Its a big doubt..
In nomenclature for aromatic compounds , when do we use "phenyl". Is its C6H5 or any side chain on the ring compound..
Is its for side chain , then if NO2 group is there on the ring , why we write nitrobenzene & not phenylbenzene?
if from benzene a hydrogen is removed then the compound C6H5 is called phenyl.
but if a group ex. N02 is attached then it is no more a free phenyl, as in place of hydrogen a group is attached (no vacant place). thus it is called differently as nitrobenzene.