Question

The basic principle behind the analysis of compounds using infrared spectroscopy is the

1)absorption of radiation by nuclei placed in a magnetic field.
2)movement of electrons between different atomic energy levels.
3)bending or stretching of covalent bonds in molecules.
4)movement of electrons between molecular energy level

Answer 1

Answer:

The IR spectroscopy theory utilizes the concept that molecules tend to absorb specific frequencies of light that are characteristic of the corresponding structure of the molecules. The energies are reliant on the shape of the molecular surfaces, the associated vibronic coupling, and the mass corresponding to the atoms.