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प्रश्न
Nucleophilic substitution reaction of 2, 4-dinitrochlorobenzene is faster than p-nitrochlorobenzene. Give reason.
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उत्तर
- The presence of electron-withdrawing (–NO2) group at ortho and para position greatly increases the reactivity of 2, 4-dinitrochlorobenzene towards substitution of halogen atom.
- Greater the number of electron-withdrawing (–NO2) groups at o and p position, greater is the reactivity. Therefore, nucleophilic substitution reaction of 2, 4-dinitrochlorobenzene is faster than p-nitrochlorobenzene.
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संबंधित प्रश्न
Name the reagent used to bring about the following conversion.
Chlorobenzene to biphenyl
Distinguish between SN1 and SN2 mechanism of substitution reaction.
Convert the following:
Propene to propan-1-ol
Convert the following:
Ethanol to propane nitrile
Convert the following:
2-Chloropropane to propan-1-ol
Explain. Aryl halides are less reactive than alkyl halides towards nucleophilic substitution reactions.
In alkaline hydrolysis of tertiary butyl bromide, ____________.
The least reactive towards nucleophilic addition reactions is ____________.
How many metameric ethers are represented by the molecular formula C4H10O?
Which one is most reactive towards nucleophilic addition reaction?
Which of the following carbocation is the most stable?
The SN2 reaction of a compound containing an asymmetric carbon atom always gives ____________.
Identify 'B' in the following reaction.
\[\ce{2-Bromobutane ->[KOH alc.][\Delta] A ->[HI] B}\]
What is the major product obtained in the sulphonation of chlorobenzene with concentrated sulphuric acid?
The major product formed when 2-bromobutane is treated with alcoholic KOH is ______.
Which of the following statements is incorrect regarding the dehydrohalogenation of alkenes?
With which halogen the reactions, of alkanes are explosive?
The compound that reacts the fastest with sodium methoxide is ______.
Explain the dehydrohalogenation reaction of 2-chlorobutane.
Complete the following reactions giving a major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{................}\\
|\phantom{..................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{..................}\\
\ce{CH3}\phantom{................}
\end{array}\]
Complete the following reaction giving a major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl->[Na/dry ether]A}\\
|\phantom{..................}\\
\ce{CH3}\phantom{................}
\end{array}\]
Observe the following and answer the questions given below:
Name the type of halogen derivative.
Discuss β - elimination reaction.
Complete the following reaction, giving a major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{................}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{...................}\\
\ce{CH3}\phantom{................}
\end{array}\]
Complete the following reaction giving major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{...............}\\
|\phantom{..................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether]A}\\
|\phantom{...................}\\
\ce{CH3}\phantom{.................}
\end{array}\]
Which of the following pair of compounds on heating gives butanenitrile?
Identify the substrate 'X' in the following reaction.
\[\ce{\underset{}{X + O2} ->[i) Co-naphtenate 423 K][ii) dil HClΔ] \underset{\underset{}{}}{Phenol + Acetone}}\]
Which of the following reagent is used for conversion of alkyl halide into nitrile?
