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प्रश्न
Show how will you synthesize pentan-1-ol using a suitable alkyl halide.
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उत्तर
Hydrolysis of 1-bromopentane by aqueous NaOH gives pentan-1-ol.
\[\ce{\underset{1-bromopentane}{CH3 - CH2 - CH2 - CH2 - CH2 - Br} + NaOH ->[\Delta][S_{N}2 Hydrolysis ] \underset{pentan-1-ol}{CH3CH2CH2CH2 - CH2 - OH} + NaBr}\]
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संबंधित प्रश्न
Write the mechanism of the following reaction :
Give the equation of the following reaction:
Oxidation of propan-1-ol with alkaline KMnO4 solution.
Name the reagent used in the following reaction:
Oxidation of a primary alcohol to carboxylic acid.
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.)
Write the mechanism (using curved arrow notation) of the following reaction :
In the reduction \[\ce{R - CHO + H2 -> RCH2OH}\] the catalyst used is:
Dehydration of 2-butanol yields:
Which of the following is not true in case of reaction with heated copper at 300°C?
Primary and secondary alcohols on the action of reduced copper give:
Identify the secondary alcohols from the following set:
- \[\ce{CH3CH2CH(OH)CH3}\]
- \[\ce{(C2H5)3COH}\]
Suggest a reagent for the following conversion.
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?
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
