Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Reduction of diazonium salt to Arene -
- The reduction of diazonium salt gives some arene in presence of some mild reagent.
- These reagents can be -
- Hypophosphorous acid
- Ethanol
- The most common use reagent in the reaction is ethanol.
Explanation:
The given reaction is a two-step reaction-
- Diazotization of tribromoaniline -
- Diazotization of 2,4,6-tribromoaniline is done with the help of NaNO2 in presence of HCl.
- Diazonium salt of given arene is obtained as a result of the first step.
- Reduction of the obtained diazonium salt -
- It is generally done with the help of ethyl alcohol.
- The corresponding arene is obtained as a product of the second step.
The overall reaction is -
∴ Reagent R should be C2H5OH with a diazonium salt.
Hence, the correct answer is option 3.
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