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Calculate this with explaination calculate the ir active vibrations of chloroform
Accepted Answer
Chloroform (CHCl3) has four fundamental vibrational modes. To determine IR active vibrations, we need to consider changes in dipole moment during the vibration.
1. Symmetric C-H stretch: This vibration is IR inactive because the dipole moment remains unchanged.
2. Asymmetric C-H stretch: This vibration is IR active because the dipole moment changes during the vibration.
3. C-Cl symmetric stretch: This vibration is IR inactive as the dipole moment does not change.
4. C-Cl asymmetric stretch: This vibration is IR active because the dipole moment changes.
Therefore, Chloroform exhibits two IR active vibrations: asymmetric C-H stretch and asymmetric C-Cl stretch.
Note: The bending modes are also IR active, but their explanation is more complex.
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