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Question

(a) Write the reactions involved in the following: 

(i) Hoffmann bromamide degradation reaction 

(ii) Diazotisation 

(iii) Gabriel phthalimide synthesis 

(b) Give reasons : 

(i)  (CH3)2NH  is more basic than (CH3)3N  in an aqueous solution. 

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


Solution

(a) (i)  RCONH2+Br2+4NaOHRNH2+2NaBr+Na2CO3+2H2O


(b) (i) Because of the combined effect of inductive effect of inductive effect and solvation effect.

(ii) Due to resonance stablisation of aromatic diazonium salts.

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