Tribromobenzene

A tribromobenzene gives 2 isomers when mononitrated.Why can't the compound be 1,2,4 - tribromobenzene?

2 Answers

if it had been so, there would have been three possible isomers ! so the answer should be 1,2,3 tribromobenzene

k got your point...but why 1,2,3 tribromobenzene? i thnk it should be 1,2,4 tribromobenzene...

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