Hydrocarbons Question 194
Question: Propane cannot be prepared from which reaction [DCE 2003]
Options:
A) $ CH_3-CH=CH_2\underset{O{H^{-}}}{\mathop{\xrightarrow{B_2H_6}}} $
B) $ CH_3CH_2CH_2I\underset{P}{\mathop{\xrightarrow{HI}}} $
C) $ CH_3CH_2CH_2Cl\xrightarrow{Na} $
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
Hydroboration of alkenes followed by hydrolysis in basic medium yield alcohols and not the alkanes.
$ R-CH=CH_2\xrightarrow{B_2H_6}{{(R-CH_2-CH_2)}_3}-B $
$ \xrightarrow{O{H^{-}}}R-CH_2-CH_2OH $
BETA
