Question

5. The rotation-vibration spectrum of CO and a table with some assignments are below. a. In which branch do the peaks seem to be converging? What does that tell you about the bond length in the v=1 state compared to the v=0? Does this make sense in the limit of a harmonic oscillator? b. Using the R(9) and P(11) transitions, use simultaneous equations to calculate the rotational constant in the v=0 state, and hence the bond length in v=0. c. Using the R(9) and P(9) transitions, calculate the bond length in v=1 in the same manner. CO Table: Some experimental assignments of peaks in the CO spectrum Label Wavenumber Label Wavenumber R(9) 2179.761 P(9) 2107.413 R(10) 2183.226 P(10) 2103.265 R(11) 2186.636 P(11) 2099.096 R(12) 2190.010 P(12) 2094.870 R(13) 2193.357 P(13) 2090.603

          5. The rotation-vibration spectrum of CO and a table with some assignments are below.
a. In which branch do the peaks seem to be converging? What does that tell you
about the bond length in the v=1 state compared to the v=0? Does this make sense
in the limit of a harmonic oscillator?
b. Using the R(9) and P(11) transitions, use simultaneous equations to calculate the
rotational constant in the v=0 state, and hence the bond length in v=0.
c. Using the R(9) and P(9) transitions, calculate the bond length in v=1 in the same
manner.
CO
Table: Some experimental assignments of peaks in the CO spectrum
Label	Wavenumber	Label	Wavenumber
R(9)	2179.761	P(9)	2107.413
R(10)	2183.226	P(10)	2103.265
R(11)	2186.636	P(11)	2099.096
R(12)	2190.010	P(12)	2094.870
R(13)	2193.357	P(13)	2090.603

5. The rotation-vibration spectrum of CO and a table with some assignments are below.
a. In which branch do the peaks seem to be converging? What does that tell you
about the bond length in the v=1 state compared to the v=0? Does this make sense
in the limit of a harmonic oscillator?
b. Using the R(9) and P(11) transitions, use simultaneous equations to calculate the
rotational constant in the v=0 state, and hence the bond length in v=0.
c. Using the R(9) and P(9) transitions, calculate the bond length in v=1 in the same
manner.
CO
Table: Some experimental assignments of peaks in the CO spectrum
Label Wavenumber Label Wavenumber
R(9) 2179.761 P(9) 2107.413
R(10) 2183.226 P(10) 2103.265
R(11) 2186.636 P(11) 2099.096
R(12) 2190.010 P(12) 2094.870
R(13) 2193.357 P(13) 2090.603

Added by Mariano B.

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