Beginner Topic 769 of 1102 Organic Chemistry
Reaction Types in Organic Chemistry
Substitution, addition, elimination and rearrangement reactions are the main classes.
In-depth explanation of Reaction Types in Organic Chemistry
Organic reactions are commonly classified into a few main types: substitution, in which one atom or group replaces another; addition, in which atoms add across a multiple bond; elimination, in which atoms are removed to form a multiple bond; and rearrangement, in which the skeleton reorganizes. Oxidation, reduction and condensation are also important, with condensation joining molecules and releasing a small molecule such as water. Classifying a reaction allows you to predict its likely mechanism and the type of product that will form. This classification is the basis of most organic reasoning.
Going deeper: Reaction Types in Organic Chemistry
Key ideas: The four basic types: substitution (one group replaced), addition (pi bond consumed), elimination (pi bond formed) and rearrangement. Other categories are oxidation, reduction, condensation and pericyclic reactions. Classify by checking how many substrates become how many products and what happens to the degree of unsaturation: addition lowers it, elimination raises it.
Common mistakes and connections: Students call every reaction involving a leaving group substitution even when it is elimination, and mix up condensation (small molecule lost, such as water) with addition. Another error is judging a mechanism from the product alone. Links to nearly every reaction topic; identify the type first before predicting a product.
Visualization of Reaction Types in Organic Chemistry
Four main classes of organic reaction: substitution, addition, elimination and rearrangement, differing in how the number of bonded groups changes. The interactive lesson shows this as a live animation or chart.
Worked example and use case
An alkene reacting with HBr is an addition reaction, while a haloalkane reacting with OH- is a substitution reaction.
Frequently asked questions about Reaction Types in Organic Chemistry
What is Reaction Types in Organic Chemistry?
Substitution, addition, elimination and rearrangement reactions are the main classes.
Is Reaction Types in Organic Chemistry a beginner, intermediate or advanced topic?
Reaction Types in Organic Chemistry is a beginner topic in Organic Chemistry. It needs no earlier chemistry lessons and is a good starting point.
What should I learn before Reaction Types in Organic Chemistry?
Study these earlier topics in Organic Chemistry first: Carbenes, Homolytic and Heterolytic Fission, Electrophiles and Nucleophiles.
What comes after Reaction Types in Organic Chemistry?
The next topics in Organic Chemistry are Free Radical Halogenation and Combustion of Hydrocarbons.
Can I practise Reaction Types in Organic Chemistry with quizzes?
Yes. The interactive lesson includes a self-check question on Reaction Types in Organic Chemistry, and the Organic Chemistry quiz draws on every topic in this area.
Where Reaction Types in Organic Chemistry fits in Organic Chemistry
Reaction Types in Organic Chemistry is topic 41 of 148 in Organic Chemistry.