Why is the infrared absorption for the stretching motion of internal alkynes rarely observed?
A)They do not form cations.
B)They are too strong.
C)Stretching in internal alkynes does not involve a change in dipole moment.
D)They do not have hydrogens.

Question

Quizplus · Accepted Answer

The stretching motion in internal alkynes does not involve a change in dipole moment, which is necessary for infrared absorption.

Why Is the Infrared Absorption for the Stretching Motion of Internal