Alcohols Phenols And Ethers Question 80
Question: To prepare 3-ethylpentan-3-ol, the reagents needed are:
Options:
A) $ CH_3CH_2MgBr+CH_3COCH_2CH_3 $
B) $ CH_3MgBr+CH_3CH_2CH_2COCH_2CH_3 $
C) $ CH_3CH_2MgBr+CH_3CH_2COCH_2CH_3 $
D) $ CH_3CH_2CH_2MgBr+CH_3COCH_2CH_3 $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] First write down the structure of the required compound, observe the nature of functional group, $ CH_3CH_2-\underset{OH}{\overset{C_2H_5}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}}}}-CH_2CH_3 $ and review the memory for preparing the required functional group. Here the required compound is a $ 3{}^\circ $ alcohol having three ethyl groups, so only combination given in option c will introduce three ethyl groups. $ CH_3CH_2MgBr+CH_3CH_2COCH_2CH_3\xrightarrow{{}} $
$ CH_3CH_2\underset{OH}{\overset{CH_2CH_3}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}}}}CH_2CH_3 $
BETA
