Each of the following reactions has been carried out under conditions such that disubstitution or trisubstitution occurred. Identify the principal organic product in each case. (a) Nitration of p-chlorobenzoic acid (dinitration) (b) Bromination of aniline (tribromination) (c) Bromination of o-aminoacetophenone (dibromination) (d) Bromination of p-nitrophenol (dibromination) (e) Reaction of biphenyl with tert-butyl chloride and iron(III) chloride (dialkylation) (f) Sulfonation of phenol (disulfonation)

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A:

Q: Br- NaCN O2N 'NH2

A: The mechanism is given below -

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Organomagnesium compounds

The interaction of alkyl halide with Mg metal in a suitable ether solvent is the common method for the synthesis of the Grignard reagent.

Hydrolysis Grignard Reactions and Reduction

Organomagnesium halides are Grignard reagents. Francois Auguste Victor Grignard, a French chemist who received the Nobel Prize in Chemistry in 1912, created these highly useful reagents.