Bond vibrations for the symmetric and asymmetric stretch in methane are illustrated below. Decide whether each vibration will result in the absorption of IR radiation. Arrows indicate the movement of atoms during the vibration.

Video transcript

Hey everyone, we're told that the following illustration shows the bond vibrations for the symmetric and asymmetric stretch and methane, which vibration will cause infrared radiation to be absorbed. Note that the arrows depict the movement of Adams during the vibration. First assessing our symmetric stretch, we can see that our disciple moments cancel out. So this means with our symmetric stretch, there will be no change in our disciple moment assessing our asymmetric stretch, We can see that there is a change in the vibration right here, so our disciple moments do not cancel out and we will have a change in our diaper moments. And the reason why this is important because if there is no change in our diable moment, this means our infrared radiation will not not be absorbed now in comparison to our asymmetric stretch. Since we have that change in our dipole moment, our infrared radiation will be absorbed. So our answer here is going to be our asymmetric stretch will cause infrared radiation to be absorbed. Now I hope that made sense. And let us know if you have any questions