Question
Download Solution PDFWhich of following reaction names is suitable for the below reaction?
CH3CH2Br + HS- → CH3CH2SH + Br-
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
SN2 Reaction Mechanism
- SN2 (Substitution Nucleophilic Bimolecular) reactions involve a single step mechanism where the nucleophile attacks the substrate at the same time as the leaving group departs.
- The reaction follows second-order kinetics, meaning the rate of reaction depends on both the concentration of the nucleophile and the substrate.
- The nucleophile performs a backside attack, leading to an inversion of the configuration if the substrate is chiral (known as Walden inversion).
EXPLANATION:
- In the given reaction:
CH3CH2Br + HS- → CH3CH2SH + Br-
- The substrate CH3CH2Br undergoes nucleophilic substitution.
- The nucleophile HS- attacks the carbon atom bonded to the bromine atom (Br) in a backside attack.
- Bromine (Br) acts as the leaving group and departs simultaneously with the nucleophile attack.
- This mechanism is consistent with an SN2 reaction, which occurs in one step without the formation of an intermediate.
The reaction mechanism does not involve the formation of a carbocation (as in SN1), nor does it involve intramolecular substitution (SNi) or aromatic substitution (SNar).
Therefore, the correct answer is SN2 reaction.
Last updated on Jul 15, 2025
-> The DSSSB PGT Application Form 2025 has been released. Apply online till 7 August.
-> The DSSSB PGT Notification 2025 has been released for 131 vacancies.
-> Candidates can apply for these vacancies between 8th Juy 2025 o 7th August 2025.
-> The DSSSB PGT Exam for posts under Advt. No. 05/2024 and 07/2023 will be scheduled between 7th to 25th July 2025.
-> The DSSSB PGT Recruitment is also ongoing for 432 vacancies of Advt. No. 10/2024.
-> The selection process consists of a written examination and document verification..
-> Selected Candidates must refer to the DSSSB PGT Previous Year Papers and DSSSB PGT Mock Test to understand the trend of the questions.