The second part of the infrared spectrum is called the fingerprint region; it is associated with types of motion allowed by the symmetry of the molecule and influenced by the bond energies.
A segunda parte do espectro infravermello denomínase a rexión da pegada dactilar; está asociada con certos tipos de movemento permitidos pola simetría da molécula e influídos polas enerxías de enlace.