which will give the least amount of ortho isomers on nitration?a) fluorobenzeneb) chlorobenzenec) bromobenzened) iodobenzene

Dear student,

It will be clear from the concept:

In aromatic nitration,aromatic organic compounds are nitrated via an electrophilic aromatic substitution mechanism involving the attack of the electron-rich benzene ring by the nitronium ion

The formation of a nitronium ion (the electrophile) from nitric acid and sulfuric acid and subsequent reaction of the ion with benzene is shown below:

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