The Born-Oppenheimer Approximation

The Born-Oppenheimer Approximation is a simplification used in quantum chemistry that separates the movement of electrons and nuclei in a molecule. Since electrons are much lighter and move faster than nuclei, we can assume nuclei are nearly stationary when studying electrons' behavior. This allows scientists to analyze electronic structure and molecular behavior separately, making complex calculations more manageable. After understanding the electrons, the nuclei’s motion can be considered with this information, leading to more accurate models of molecules and their reactions.