(a) Write the reactions involved in the following :

    (i) Hofmann bromamide degradation reaction

     (ii) Diazotisation

     (iii) Gabriel phthalimide synthesis

 (b) Give reasons :

     (i) (CH_3 )_{2}NHis more basic than (CH_3 )_{3}N in an aqueous solution.

     (ii) Aromatic diazonium salts are more stable than aliphatic diazonium salts.

 

 

 

 
 
 
 
 

Answers (1)
S Sumit

(a)

  (i) Hofmann bromamide degradation reaction

CH_{3}CONH_{2}+Br_{2}+4NaOH\rightarrow CH_{3}NH_{2}+Na_{2}CO_{3}+2NaBr+2H_{2}O

     (ii) Diazotisation

     (iii) Gabriel phthalimide synthesis

(b)

(i) (CH_3 )_{2}NHis more basic than (CH_3 )_{3}N in an aqueous solution because of N-H bond in (CH_3 )_{2}NH is forms hydrogen bonds in aqueous solution.

(ii) Aromatic diazonium salts are more stable than aliphatic diazonium salts because aromatic diazonium salts are resonance stabilized.

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