Advertisements
Advertisements
प्रश्न
Predict the major product of acid catalysed dehydration of butan-1-ol.
Advertisements
उत्तर १
Acid catalysed dehydration of butan-1-ol produces but-2-ene as the main product and but-1-ene as the secondary product. This is because dehydration of alcohols takes place through carbocation intermediates. Again, butan-1-ol being a 1° alcohol, on protonation and elimination of H2O, first gives a 1° carbocation (I), which being less stable rearranges to form more stable 2° carbocation (II), then it removes a proton in two different ways to form butan-2-ene or but-1-ene. Since butan-2-ene is more stable, it is the main product according to Saytzeff’s rule.
उत्तर २
\[\ce{CH3 - CH2 - CH2 - CH2 - OH ->[H+/\Delta] \underset{But-2-ene}{CH3 - CH = CH - CH3}}\]
APPEARS IN
संबंधित प्रश्न
Name the reagents used in the following reactions:
How do you convert the following : Propan-2-ol to 2-methylpropan-2-ol
Show how is the following alcohol prepared by the reaction of a suitable Grignard reagent on methanal?
\[\begin{array}{cc}
\ce{CH3 - CH - CH2OH}\\
|\phantom{........}\\
\ce{CH3}\phantom{....}\\
\end{array}\]
What is meant by hydroboration-oxidation reaction? Illustrate it with an example.
Show how will you synthesize 1-phenylethanol from a suitable alkene.
How is the following conversion carried out?
\[\ce{Propene -> Propan-2-ol}\]
How is the following conversion carried out?
\[\ce{Methyl magnesium bromide -> 2-Methylpropan-2-ol}\]
Show how you would synthesise the following alcohol from an appropriate alkene?
How will you convert: Phenol to 2, 4, 6 − trinitrophenol?
Write the structures of A, B and C in the following reactions :
Monochlorination of toluene in sunlight followed by hydrolysis by aq. \[\ce{NaOH}\] yields.
Benzaldehyde differs from acetaldehyde in that:
Magnesium wire continues to burn in the atmosphere of CO2 because
A compound does not react with 2, 4 dinitrophenylhydrazine, the compound is:
The reagent used for dehydration of an alcohol is
Most readily hydrolysed halide is:-
When alcohol react with concentrated H2SO4 intermediate compound formed is
An aldehyde isomeric with allyl alcohol gives phenyl hydrazone. Pick out a ketone that too gives a phenyl hydrazone containing the same percentage of nitrogen.
Ceric aminonium nitrate and CHCl3/alc. KOH are used for the identification of functional groups present in ______ and ______ respectively.
How are the following conversions carried out?
\[\ce{Methyl magnesium bromide ->2-Methylpropan-2-ol}\]
