An anticipated IR absorption band may not be observed because:

Question

Quizplus · Accepted Answer

All of the given options (A-D) can be a reason for not observing an anticipated IR absorption band. The instrument may not have the capacity to detect the particular wavelength of the absorption band (Option A), or the vibration may not produce a change in dipole moment (Option B). The absorption band may be hidden behind another band in the spectrum (Option C), or the intensity of the band may be too weak to differentiate from instrument noise (Option D). Thus, all options are possible reasons for not observing an anticipated IR absorption band.

An Anticipated IR Absorption Band May Not Be Observed Because