Transition State
| Formula / Notation | Transition state: [A---B]‡ at top of energy barrier; ΔG‡ = activation energy |
|---|---|
| Also Known As | Activated complex, transition state species, TS, saddle point |
What is Transition State?
The highest-energy species along a reaction coordinate, occurring at the activation energy maximum. Unlike intermediates, transition states cannot be isolated. They involve partial bond breaking and forming. The transition state theory explains how activation energy relates to reaction rate.
Formula & Notation
Other Names / Synonyms: Activated complex, transition state species, TS, saddle point
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The highest-energy species along a reaction coordinate, occurring at the activation energy maximum. Unlike intermediates, transition states cannot be isolated. They involve partial bond breaking and forming. The transition state theory explains how activation energy relates to reaction rate.
Transition state theory is used to calculate and predict reaction rate constants. It guides the design of enzyme active sites and organocatalysts that stabilise specific transition states. Computational chemistry models transition state structures to develop better catalysts.
Transition states are theoretical constructs, but reactions with unstable or energetic transition states may produce reactive intermediates. Understanding transition state energetics helps identify conditions where reactions become uncontrolled.
The formula or notation for Transition State is: Transition state: [A---B]‡ at top of energy barrier; ΔG‡ = activation energy