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Using one of the plots of IR transmission shown below, calculate the bond strength of the C-O double bond (HINT: treat the complicated molecule as a diatomic one, with everything other than the O lumped into a single “atom”). Explain why the frequencies could be different for the two different molecules shown.

C-H fingerprint region 40 0 1709 1716 3500 3000 2000 1500 1000 1500 Wavenumber (cm Wavenumber (cm)

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Answer #1
  • bond strength is calculated in terms of force constant and calculation for force constant is shown below:
  • need to take am assumption as co is a diatomic molecule. In mat case-the-fovmula u.sed luube e,strething frequency fore.censt
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