The rovibrational spectrum of CO is shown below.

File:Carbon monoxide rotational-vibrational spectrum.png

A. Estimate the vibrational wavenumber of the stretching mode of CO from this spectrum.

 

 

 

B. Based on this wavenumber calculate the force constant of the CO bond.

 

 

 

 

C. Estimate the rotational constant from the expansion of the figure shown below. The progression of lines has wave numbers 2146.8, 2150.7, 2154.6, 2158.4 cm-1 and so on.

 

CO_spectrum_expand.bmp

 

 

 

 

D. Based on this wavenumber calculate the bond length of CO.