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  • (a) Write the structures of the main products of the following reactions :     (i) <img alt="\xrightarrow[Py

(a) Write the structures of the main products of the following reactions :

    (i) \xrightarrow[Pyridine]{(CH_{3}CO)_{2}O}

    (ii) \overset{(CH_{3})_{2}NH}{\rightarrow}

    (iii) \overset{CH_{3}CH_{2}OH}{\rightarrow}

(b) Give a simple chemical test to distinguish between Aniline and N,N-dimethylaniline.

(c) Arrange the following in the increasing order of their pK_b values : C_{6}H_{5}NH_{2} , C_{2}H_{5}NH_{2} , C_{6}H_{5}NHCH_{3}

 

 

 

 
 
 
 
 

Answers (1)

    (i) \xrightarrow[Pyridine]{(CH_{3}CO)_{2}O}

    (ii) \overset{(CH_{3})_{2}NH}{\rightarrow}

    (iii) \overset{CH_{3}CH_{2}OH}{\rightarrow}  + CH_{3}CHO+N_{2}+HCl

(b) Aniline and N-N dimethylaniline Aniline on reaction with choloform and alc. KOH gives bad smelling pheylisocyanide but N,N - dimethylaniline does not give this test.

CH_{3}Cl_{3}+alc.KOH\rightarrow

 

(c)  Increasing order of their pK_b values

C_{2}H_{5}NH_{2} < C_{6}H_{5}NHCH_{3}<C_{6}H_{5}NH_{2}

Posted by

Sumit Saini

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