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8.33 Carbon monoxide binds strongly to the Fe2+ ion of the haem group of the protein myoglobin. Estimate the vibrational frequency of CO bound to myoglobin by using the data below and by making the following assumptions: the atom that binds to the haem group is immobilized, the protein is infinitely more massive than either the C or O atom, the C atom binds to the Fe2+ ion, and binding of CO to the protein does not alter the force constant of the image from custom entry toolbond. (C triple bond O)

The following data on the infrared absorption wavenumbers ( wavenumbers in cm- 1) of molecules are taken from Spectra of diatomic molecules, G. Herzberg, van Nostrand ( 1950):

H35Cl 2990

H81Br 2650

HI 2310

CO 2170

NO 1904

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