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harmonic vibrational frequency vibrational anharmonicity

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For the 127I35Cl molecule, the following transitions are detected in the infrared. From this data, deduce the harmonic vibrational frequency (? ?_e) and the vibrational anharmonicity (? ?_e x ?_e), both in units of cm-1. Note that the following are the result of careful spectroscopic study that can detect weak, "forbidden" transitions (overtones like 0?2).

Transition Frequency (cm-1)
0? 1 381.20
0? 2 759.60
0? 3 1135.00
0? 4 1507.40
0? 5 1877.00

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This solution provides a detailed process explaining how to find harmonic vibrational frequency and the vibrational anharmonicity.

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