Advertisements
Advertisements
Question
Mark the correct increasing order of reactivity of the following compounds with HBr/HCl.
| (a) |  |
| (b) |  |
| (c) |  |
Options
a < b < c
b < a < c
b < c < a
c < b < a
Advertisements
Solution
b < c < a
Explanation:
It is type of nucleophilic substitution reaction followed by SN1 mechanism. SN1 mechanism depends on the stability of carbonation. Presence of electron-withdrawing group will decrease the stability of carbocation.
APPEARS IN
RELATED QUESTIONS
Show how will you synthesize pentan-1-ol using a suitable alkyl halide.
Give the equation of the following reaction:
Treating phenol with chloroform in the presence of aqueous NaOH.
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
Name the reagent used in the following reaction:
Benzyl alcohol to benzoic acid.
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 ____________.
By which of the following methods alcohol can be prepared in excellent yield?
Dehydration of 2-butanol yields:
Which of the following is not true in case of reaction with heated copper at 300°C?
Lucas test is done to differentiate between ____________.
Cyclohexene is best prepared from cyclohexanol by which of the following:
The process of converting alkyl halides into alcohols involves ______.
Suggest a reagent for the following conversion.
Explain why nucleophilic substitution reactions are not very common in phenols.
In Kolbe’s reaction, instead of phenol, phenoxide ion is treated with carbon dioxide. Why?
Which of the following alcohols will not undergo oxidation?
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.
