Advertisements
Advertisements
Question
Show how will you synthesize pentan-1-ol using a suitable alkyl halide.
Advertisements
Solution
Hydrolysis of 1-bromopentane by aqueous NaOH gives pentan-1-ol.
\[\ce{\underset{1-bromopentane}{CH3 - CH2 - CH2 - CH2 - CH2 - Br} + NaOH ->[\Delta][S_{N}2 Hydrolysis ] \underset{pentan-1-ol}{CH3CH2CH2CH2 - CH2 - OH} + NaBr}\]
APPEARS IN
RELATED QUESTIONS
Write the mechanism of the following reaction:
Give the equation of the following reaction:
Treating phenol with chloroform in the presence of aqueous NaOH.
Name the reagent used in the following reaction:
Oxidation of a primary alcohol to aldehyde.
When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place:
\[\begin{array}{cc}
\phantom{.......................}\ce{Br}\\
\phantom{......................}|\\
\ce{CH3 - CH - CH - CH3 ->[HBr] CH3 - C - CH2 - CH3}\\
\phantom{.}|\phantom{......}|\phantom{......................}|\phantom{........}\\
\phantom{}\ce{CH3}\phantom{...}\ce{OH}\phantom{...................}\ce{CH3}\phantom{.....}
\end{array}\]
Give a mechanism for this reaction.
(Hint: The secondary carbocation formed in step II rearranges to a more
stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.)
Lucas reagent is ____________.
The compound which reacts fastest with Lucas reagent at room temperature is:
Which of the following are used to convert RCHO into RCH2OH?
(i) H2/Pd
(ii) LiAlH4
(iii) NaBH4
(iv) Reaction with RMgX followed by hydrolysis
Cyclohexene is best prepared from cyclohexanol by which of the following:
\[\ce{CH3CH2OH}\] can be converted into \[\ce{CH3CHO}\] by ______.
Mark the correct increasing order of reactivity of the following compounds with HBr/HCl.
| (a) |  |
| (b) |  |
| (c) |  |
Name the factors responsible for the solubility of alcohols in water.
Explain why is OH group in phenols more strongly held as compared to OH group in alcohols.
In Kolbe’s reaction, instead of phenol, phenoxide ion is treated with carbon dioxide. Why?
Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert-butyl ether can’t be prepared by this method. Explain.
Assertion: Bond angle in ethers is slightly less than the tetrahedral angle.
Reason: There is a repulsion between the two bulky (–R) groups.
What is Lucas reagent?
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
