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Question
Given reasons: SN1 reactions are accompanied by racemization in optically active alkyl halides.
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Solution
In SN1 reaction, formation of carbocation as an intermediate takes place. This carbocation has sp2-hybridised and planar structure. This planar carbocation is attacked by nucleophile from both the sides equally to form d and l isomers in equal proportion. Such products are called racemic mixture. Hence, SN1 reactions are accompanied by racemisation in optically active alkyl halides.
RELATED QUESTIONS
In the following pair of halogen compounds, which compound undergoes a faster SN1 reaction?
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
Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of ____________.
Racemic compound has ____________.
Complete the following analogy:
Same molecular formula but different structures: A : : Non superimposable mirror images: B
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.
Racemisation occurs in ______.
Convert bromoethane to propanamine.
Assertion (A): 
undergoes SN2 reactions faster than 
.
Reason (R): Iodine is a better leaving group because of its large size.
In the light of the above statements, choose the correct answer from the options given below:
The compound that will undergo SN1 reaction with the fastest rate is:
