Machine-translated by Google. Questions are authored in English.
Top

Discussion

A vibration is infrared active only if it produces a change in the molecule's

  • A.total electronic energy
  • B.moment of inertia
  • C.dipole moment
  • D.polarisability

Answer: C

The oscillating dipole is what couples to the electromagnetic field, so a symmetric stretch of a symmetrical molecule is silent. Such a vibration is instead Raman active, which is why the two techniques complement one another.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.