Reaction mechanisms describe the step-by-step process by which reactants change into products during a chemical reaction. They explain how chemical bonds break and new bonds form in complex reactions.
A reaction mechanism usually includes:
- Intermediate compounds
- Transition states
- Multiple reaction steps
For example, a reaction may occur in two or more stages instead of a single step. Each stage has its own rate and energy change.
One important concept is activation energy:
E_a=text{Minimum energy required for a chemical reaction to occur}
Catalysts can lower activation energy and speed up reactions without being consumed.
Reaction mechanisms help scientists:
- Predict reaction products
- Improve industrial chemical processes
- Develop medicines
- Understand biological reactions
They are widely used in organic chemistry, biochemistry, and chemical engineering.
