Molecular vibration changes internal separations and bond angles, unlike the fixed internal molecular geometry of a rigid rotor. Its coupling to molecular rotation makes measured rotational constants depend on the vibrational quantum state.
Articles by others on the same topic
Molecular vibration refers to the oscillatory motion of atoms within a molecule around their equilibrium positions. This phenomenon occurs because molecular bonds can be thought of as springs that can stretch and compress, allowing the atoms to move closer together or further apart. During vibration, different types of motions can occur, including: 1. **Stretching**: This can be further divided into: - **Symmetric stretching**: Both bonds are elongated or shortened simultaneously.