Question

Which factors affect the band position and intensity?

Answer 1

Answer:

The most important factor that influences the intensity of an IR absorption band is the change in dipole moment that occurs during a vibration. ... The C=C bond is nonpolar, and the molecule is symmetrical, so there is no change in dipole moment during the stretch.

Answer 2

The factor that affects the band position and intensity is as follows:

• The change in dipole moment that occurs during vibration is the most critical component that impacts the strength of an IR absorption band.
• Because the C=C bond is nonpolar and the molecule is symmetrical, the dipole moment does not change during the stretch.