Advertisements
Advertisements
प्रश्न
Which of the following statements are correct about this reaction?
(i) The given reaction follows SN2 mechanism.
(ii) (b) and (d) have opposite configuration.
(iii) (b) and (d) have same configuration.
(iv) The given reaction follows SN1 mechanism.
Advertisements
उत्तर
(i) The given reaction follows SN2 mechanism.
(ii) (b) and (d) have opposite configuration.
Explanation:
In the given reaction, alkyl halide is primary in nature. Here, a transitory state is observed in which one bond is broken and one bond is formed synchronously he., in one step. So, it follows SN2 mechanism.
In this mechanism, nucleophile attacks the carbon at 180° to the leaving group. So the reactant and product have opposite configuration.
APPEARS IN
संबंधित प्रश्न
Write the structure of the major product in each of the following reaction :
In the following pair of halogen compounds, which compound undergoes a faster SN1 reaction?
Write the structure of the major organic product in the following reaction:
\[\ce{CH3CH2Br + KCN ->[aq.ethanol]}\]
What happens when chlorobenzene is subjected to hydrolysis?
C–Cl bond length in chlorobenzene is shorter than C–Cl bond length in CH3–Cl.
Identify 'A' in the following reaction -
(a) 2- Bromo-2 methylbutane
(b) 1 -Bromo-2,2-dimethylpropane
(c) 1 - Bromo - 3 -methylbutane
(d) 1 - Bromo- 2 -methylpropane
In the SN1 reaction, racemization takes place. It is due to:
The reaction of C6H5–CH=CH–CH3 with HBr produces:
Which of the compounds will react faster in SN1 reaction with the –OH ion?
\[\ce{CH3-CH2-Cl}\] or \[\ce{C6H5-CH2-Cl}\]
Cyanide ion acts as an ambident nucleophile. From which end it acts as a stronger nucleophile in aqueous medium? Give reason for your answer.
Why are aryl halides less reactive towards nucleophilic substitution reactions than alkyl halides?
Chlorination of alkanes is an example of
Which of the following is the definition of chirality?
Give reason for the following:
The product formed during SN1 reaction is a racemic mixture.
Among the following compounds I - IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. HNO3 (iii) AgNO3?
 |
 |
 |
 |
| I | II | III | IV |
The number of chiral carbons present in the molecule given below is ______.
Racemisation occurs in ______.
Discuss the mechanism of alkaline hydrolysis of methyl bromide.
Which alkyl halide from the following pair would you expect to react more rapidly by an SN2 mechanism? Explain your answer.
\[\begin{array}{cc}\ce{CH3CH2CHCH3}\\\phantom{...}|\\\phantom{....}\ce{Br}\end{array}\] or \[\begin{array}{cc}\phantom{.....}\ce{CH3}\\\phantom{..}|\\\ce{H3C - C - Br}\\\phantom{..}|\\\phantom{....}\ce{CH3}\end{array}\]
Consider the reactions,
(i) \[\begin{array}{cc}
\phantom{}\ce{\underset{}{(CH3)2CH - CH2Br} ->[C2H5OH] \underset{}{(CH3)2CH - CH2OC2H5 + HBr}}\\
\end{array}\]
(ii) \[\begin{array}{cc}
\phantom{}\ce{\underset{}{(CH3)2CH - CH2Br} ->[C2H5O-] \underset{}{(CH3)2CH - CH2OC2H5 + Br-}}\\
\end{array}\]
The mechanisms of reactions (i) and (ii) are respectively:
