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  • (a) Draw structures of the following derivatives : (i) Cyanohydrin of cyclobutanone (ii) Hemiacetal of ethanal (b) Write the major product(s) in the following : (i)  <img alt="CH_{3}-CH=CH-CH_{2}-CN\xri

(a) Draw structures of the following derivatives :

(i) Cyanohydrin of cyclobutanone

(ii) Hemiacetal of ethanal

(b) Write the major product(s) in the following :

(i)  CH_{3}-CH=CH-CH_{2}-CN\xrightarrow[(ii)H_{3}O^{+}]{(i)DIBAL-H}

(ii)  CH_{3}-CH_{2}-OH\overset{CrO_{3}}{\rightarrow}

(c) How can you distinguish between propanal and propanone ?

 

 

 
 
 
 
 

Answers (1)

(a) 

(i) Cyanohydrin of cyclobutanone

(ii) Hemiacetal of ethanal

(b)

(i) 

 CH_{3}-CH=CH-CH_{2}-CN\xrightarrow[(ii)H_{3}O^{+}]{(i)DIBAL-H} 

(ii)

  CH_{3}-CH_{2}-OH\overset{CrO_{3}}{\rightarrow}  

(c) On heating with NaOH + I2, propanone gives yellow ppt. of CHI3 while propanal doesn’t.

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Safeer PP

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