Rotations and vibrations of polyatomic molecules

Rotations and vibrations of polyatomic molecules

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English
11 pages
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Description

  • cours magistral
Rotations and vibrations of polyatomic molecules When the potential energy surface V(~R1, ~R2, . . . , ~RN) is known we can com- pute the energy levels of the molecule. These levels can be an effect of: • Rotation of a molecule as a whole (end-over-end rotation) • Small vibrations around equilibrium configuration of the nuclei • Internal rotation - free or hindered • Tunneling • Large amplitude vibrations (van der Waals vibrations) Transitions between these levels are are observed in spectroscopy: • Infrared/Raman – vibrations • Terahertz (submillimeter) – rotations, large amplitude vibrations •Microwave –
  • analytical formula for the rotational levels
  • rotational energy
  • vector of angular velocity
  • rotational energies pattern for asymmetric rotors
  • angular momentum of the rigid body
  • rotations of polyatomic molecules
  • electronic energy

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Nombre de lectures 34
Langue English
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