Infra red spectrum and molecule to show IR spectrum:
Infrared region of the electromagnetic spectrum divided into the following three regions
- Near IR,
- Mid IR and
- Far IR
It is the mid-IR region that is most commonly used.
The prerequisite for a molecule to show IR spectrum is that the vibrations within it must cause a net change in the dipole moment of the molecule. YES, the asymmetric stretching mode of H2O molecule will be IR active.