Advertisements
Advertisements
प्रश्न
Write the mechanism of hydration of ethene to yield ethanol.
Advertisements
उत्तर १
Step 1: Protonation of the alkene to form a carbocation by the electrophilic attack of H3O+.
\[\ce{H2O + H+ -> H3O+}\]
Step 2: Nucleophilic attack of water on carbocation.
Step 3: Deprotonation to form an alcohol.
उत्तर २
The acid-catalysed hydration of ethene may be represented as:
The mechanism followed by the above reaction may be depicted as:
Generation of carbocation (Step 1): Protonation of ethene yields a carbocation as,
Nucleophilic attack of water on carbocation (Step 2): The carbocation polarises the lone pair electrons of O of water, and hydration takes place.
Formation of product, regeneration of the proton (Step 3):
APPEARS IN
संबंधित प्रश्न
How do you convert the following : Propan-2-ol to 2-methylpropan-2-ol
Write the structures of the main products when acetone (CH3 − CO − CH3) reacts with the following reagents :
CH3MgBr and then H3O+
Predict the major product of acid catalysed dehydration of 1-methylcyclohexanol.
How is the following conversion carried out?
\[\ce{Benzyl chloride -> Benzyl alcohol}\]
Name the reagent used in the following reaction:
Dehydration of propan-2-ol to propene.
Name the reagent used in the following reaction:
Butan-2-one to butan-2-ol.
Show how you would synthesise the following alcohol from an appropriate alkene?
Aldehydes react with Grignard reagent to produce ____________.
Primary alcohols are prepared by the reduction of carboxylic acids. Though lithium aluminium hydride is a strong reducing agent, it is not used in the reaction. This is so because:
Monochlorination of toluene in sunlight followed by hydrolysis by aq. \[\ce{NaOH}\] yields.
Alkenes convert into alcohols by ____________.
Commercially carboxylic acids are reduced to alcohols by converting them to the ______.
The Wittig reaction is a reaction between a carbonyl compound (aldehyde or ketone only) and a species known as a phosphoniumylide. What is the expected final product in the Wittig reaction?
The reagent used for dehydration of an alcohol is
The best reagent to convert pent 3 – en 2 – 01 into pent 3 – in – 2 – one is
Alkaline hydrolysis of an alkyl halide can be preferably carried out using ______.
For distinction between \[\ce{CH3CHO}\] and \[\ce{C6H5CHO}\] the reagent used is ______.
The major product of the following reaction is:
\[\begin{array}{cc}
\ce{Cl}\phantom{.........................}\\
|\phantom{..........................}\\
\ce{CH3 - CH - CH3 ->[(i) Alc. KOH][(ii) HBr/peroxide (iii) aq. KOH]}
\end{array}\]
