Write the systematic names of the following aromatic compounds: (i) (ii) (xix) para-Bromo - tert-butylbenzene Strategy: If there is only one group on the ring, no number is needed to designate its position. If there are two groups, we use the traditional designations (1,2-for ortho, 1,3-for meta, and 1,4-for para). If there are three or more goups on the ring then location numbers are assigned to give the lowest set of locants.

Write the systematic names of the following aromatic compounds: (i)

1.	Write the systematic names of the following aromatic compounds: (i) (ii) (xix) para-Bromo - tert-butylbenzene Strategy: If there is only one group on the ring, no number is needed to designate its position. If there are two groups, we use the traditional designations (1,2-for ortho, 1,3-for meta, and 1,4-for para). If there are three or more goups on the ring then location numbers are assigned to give the lowest set of locants.
Answer» Solution :(i) Ethylbenzene (ii) `n`-PROPHYLBENZENE (iii) (`2`-Methylpropyl) benzene (or Isobutylbenzene) (iv) `p`-Ethyltoluene (V) `1`-Bromo-`3`-nitrobenzene or `m`-Bromonitrobenzene (vi) `m`-Ethylisopropylbenzene (vii) `2`-Methyl-`3`-phenylpentane (VIII) (ix) `2`-Phenylethyne (or phenylacetylene) (xi) `2,4`-Difluorobenzenesulphonic acid (xii) (xiii) (xiv) `1,2,4`-Trinitrobenzene (xv) `1`-Ethenyl -`3`-ethyl `-5`- etynylbenzene (xvi) `1`-Iodo-`2`-metylbenzene ( or `o`-Iodotoluene) (xvii) `1`-Bromo-`3`-ethenylbenzene (or `m`-bromostyrene) (xviii) `4`-Ethyl -`1,2`-dimethylbenzene (not `1`-Ethyl-`3,4`-dimethyl benzene which has higher SET of locants) (xix)