vibrorotasjonale

Vibrorotational refers to phenomena involving both vibration and rotation within a molecular system. These are fundamental modes of molecular motion that contribute to the overall energy of a molecule and play a crucial role in spectroscopy. Vibrational modes describe the stretching and bending of chemical bonds within a molecule, while rotational modes describe the tumbling or spinning of the molecule as a whole. The interaction between these two types of motion is known as vibrorotational coupling.

In molecular spectroscopy, particularly in infrared and Raman spectroscopy, transitions between different vibrorotational energy levels are observed. When a molecule absorbs or emits light, it can undergo a change in its vibrational state, its rotational state, or both simultaneously. This leads to complex spectral patterns where vibrational bands are further split into numerous closely spaced lines, each corresponding to a specific rotational transition occurring in conjunction with the vibrational change. The selection rules governing these vibrorotational transitions dictate which energy level changes are allowed. Studying these vibrorotational spectra provides detailed information about molecular structure, bond strengths, and intermolecular forces.