Advertisements
Advertisements
Questions
How will you bring about the following conversion?
Bromomethane to propanone
How will you bring about the following conversion in not more than two steps?
Bromomethane to propanone
Advertisements
Solution 1
\[\begin{array}{cc}
\ce{\underset{Bromomethane}{CH3 - Br} ->[Alc{.} KCN][C2H5OH, -H2O, \Delta] \underset{Acetonitrile}{CH3CN} ->[CH3MgBr/ether] [CH3 - C = NMgBr] ->[H^+/H2O][-NH3, -Mg(OH)Br] CH3 - C = O}\\
\phantom{....................................................................................}|\phantom{.........................................................}|\\
\phantom{.........................................................................................}\ce{CH3}\phantom{................................................}\ce{\underset{propanone}{CH3}}\\
\end{array}\]
Solution 2
\[\begin{array}{cc}
\ce{\underset{Bromomethane}{CH3 - Br} ->[HC = C- Na+][Liq{.} NH3, -NaBr] \underset{Propyne}{CH3 - C ≡ CH} ->[Dil{.} H2SO4][HgSO4] CH3 - C - CH3}\\
\phantom{................................................................................}||\\
\phantom{................................................................................}\ce{\underset{propanone}{O}}\\
\end{array}\]
APPEARS IN
RELATED QUESTIONS
Identify A, B, C, D, E, R and R1 in the following:
How will you bring about the following conversion?
1-Chlorobutane to n-octane
Explain why Grignard reagents should be prepared under anhydrous conditions?
What happens when methyl bromide is treated with sodium in the presence of dry ether?
How the following conversion can be carried out?
Chloroethane to butane
A Grignard reagent may be made by reacting magnesium with ____________.
Which of the following alkyl halides is used as a methylating agent?
Draw other resonance structures related to the following structure and find out whether the functional group present in the molecule is ortho, para directing or meta directing.
Why is it necessary to avoid even traces of moisture during the use of a Grignard reagent?
Which of the statements about Grignard reagent is false?
The product formed in the first step of the reaction
\[\begin{array}{cc}
\ce{Br}\phantom{......}\\
|\phantom{.......}\\
\ce{CH3-CH2-CH-CH2-CH-CH3}\\
\phantom{...............}|\\
\phantom{................}\ce{Br}
\end{array}\]
with excess Mg/Et2O(Et = C2H5) is:
Explain why Grignard reagents should be prepared under anhydrous conditions.
Explain why Grignard reagents should be prepared under anhydrous conditions?
Explain why Grignard reagents should be prepared under anhydrous conditions?
Explain why Grignard reagents should be prepared under anhydrous conditions?
Explain why Grignard reagents should be prepared under anhydrous conditions?
Explain why Grignard reagents should be prepared under anhydrous conditions?
Explain why Grignard reagents should be prepared under anhydrous conditions?
