Nucleophilic Substitution and Elimination Reactions

Name: Nucleophilic Substitution and Elimination Reactions
Author: StemPy Lab

How a haloalkane reacts, step by step. The SN2 and SN1 mechanisms with their rates and stereochemistry (inversion and racemisation), elimination and Saytzeff's rule, and how to decide which pathway wins. It covers the Indian syllabus (NCERT, NEET, JEE Main) and the halogenoalkane mechanisms of A-Level, IB Higher Level and AP.

3 lessons, about 1 h 25 min3 simulations10 problems5 practice questionsPython in every lesson

Created by StemPy Lab

Course outline (3 lessons)

Lesson 1about 30 min
Nucleophilic substitution and the SN2 mechanism
Shake bromoethane with aqueous potassium hydroxide and ethanol forms. A nucleophile has taken the place of the halogen. Here you learn which nucleophiles do this, and the one-step mechanism called $S_{\text{N}}2$ with its rate law, its inversion and the factors that speed it up.
1 simulation2 practice questions1 Python program3 problems
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Lesson 2about 30 min
The SN1 mechanism and stereochemistry
A tertiary halide dissolves slowly in water and gives an alcohol, and adding more nucleophile does not speed it up. The reaction goes in two steps through a carbocation. That also explains why a chiral halide gives a mixture of mirror images.
1 simulation2 practice questions1 Python program4 problems1 Python lab
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Lesson 3about 25 min
Elimination and choosing the pathway
Heat a haloalkane with alcoholic potassium hydroxide and you may not get an alcohol at all. You get an alkene, because the base removes a hydrogen atom instead of replacing the halogen. This lesson shows which way a reaction goes and how to predict the main product.
1 simulation1 practice question1 Python program3 problems1 Python lab1 question set1 note
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Substitution and Elimination: Timed Test

10 questions · 25 min

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← Haloalkanes and Haloarenes

← Haloalkanes: Naming, Bonding and Preparation Haloarenes and Polyhalogen Compounds →

More onOrganic Compounds with Functional Groups › Haloalkanes and Haloarenes

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Nucleophilic Substitution and Elimination Reactions

Course outline (3 lessons)

Nucleophilic substitution and the SN2 mechanism

The SN1 mechanism and stereochemistry

Elimination and choosing the pathway

Test Your Learning

Your teacher

Discussion (0)