Activated complex

Definition

The activated complex, also known as the transition state, is a temporary and unstable arrangement of atoms formed during a chemical reaction. It represents the highest energy point along the reaction pathway.

5 Must Know Facts For Your Next Test

1. The activated complex has higher energy than both reactants and products.
2. It is formed at the peak of the potential energy barrier in a reaction.
3. The formation of an activated complex is essential for a reaction to proceed.
4. It is short-lived and cannot be isolated.
5. The activated complex can either lead to the formation of products or revert back to reactants.

Review Questions

• What is another name for the activated complex?
• Why can't the activated complex be isolated?
• What role does the activated complex play in determining the rate of a chemical reaction?

Related terms

Activation Energy:

The minimum amount of energy required for reactants to form an activated complex and proceed to form products.

Reaction Rate:

The speed at which reactants are converted into products in a chemical reaction.

Potential Energy Diagram:

A graphical representation showing the energy changes during a chemical reaction, indicating activation energy and the energies of reactants, products, and the activated complex.