Advertisements
Advertisements
प्रश्न
\[\ce{CH3CH2OH}\] can be converted into \[\ce{CH3CHO}\] by ______.
पर्याय
catalytic hydrogenation
treatment with \[\ce{LiAlH4}\]
treatment with pyridinium chlorochromate
treatment with \[\ce{KMnO4}\]
Advertisements
उत्तर
\[\ce{CH3CH2OH}\] can be converted into \[\ce{CH3CHO}\] by treatment with pyridinium chlorochromate.
Explanation:
Alcohols are oxidized to aldehydes and finally to acids.
\[\ce{CH3CH2OH ->[{[O]}] CH3CHO ->[{[O]}] CH3COOH}\]
Oxidations can be stooped at aldehyde stage by using pyridinium chlorochromate
\[\ce{(CrO3C5H5N.HCl)}\].
\[\ce{CH3CH2OH ->[PCC] CH3CHO}\]
APPEARS IN
संबंधित प्रश्न
Write the final product(s) in each of the following reactions:
Give reasons for the following:
o-nitrophenol is more acidic than o-methoxyphenol.
Write the mechanism of the following reaction :
Write the mechanism of the following reaction :
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
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:
\[\begin{array}{cc}
\phantom{...................................}\ce{Br}\\
\phantom{..................................}|\\
\ce{CH3 - CH - CH - CH3 ->[HBr] CH3 - C - CH2 - CH3}\\
|\phantom{.........}|\phantom{...................................}|\phantom{...........}\\
\ce{CH3}\phantom{...}\ce{OH}\phantom{...............................}\ce{CH3}\phantom{.......}\\
\end{array}\]
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.)
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
Lucas test is done to differentiate between ____________.
Cyclohexene is best prepared from cyclohexanol by which of the following:
Identify the secondary alcohols from the following set:
- \[\ce{CH3CH2CH(OH)CH3}\]
- \[\ce{(C2H5)3COH}\]
Name the factors responsible for the solubility of alcohols in water.
What is Lucas reagent?
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 dehydration of ethanol to yield ethene.
