| Objectives |
| After studying this lecture, you will be able to |
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Calculate the bond lengths of diatomics from the value of their rotational constant. |
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Outline the selection rules for rotational and vibrational spectra and rationalize the role of the molecular dipole moment in the selection rules. |
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Distinguish between the energy levels of a rigid and a non rigid rotor. |
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Distinguish between harmonic and anharmonic vibrations. |
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Sketch qualitatively rotational-vibrational spectrum of a diatomic. |
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Calculate the relative populations of rotational and vibrational energy levels. |
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Identify the IR frequencies where simple functional groups absorb light. |
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