A. Draw the MO diagram for ground-state N2, identify the molecular orbitals invo

Question

A. Draw the MO diagram for ground-state N2, identify the molecular orbitals involved in the transition to the first excited state, and indicate on the diagram where the electron goes when it is excited.

b. Determine the bond order of N2 to that of N2* (N2 in its first excited state). Is the bond length in N2 greater than or less than the bond length in N2*? Explain

c. Is N2* diamagnetic or paramagnetic? Explain

d. N2* relaxes back to the ground state and emits a photon of wavelength 470 nm. Calculate the energy difference between the MOs involved in the transition. (here is where I am struggling, not sure how to apply the wavelength in order to calculate difference in energy)

Explanation / Answer

d) Energy differnce E = h x v = h x c/lamda    where h =planks constant = 6.625 x 10^ -34 J/s

c = speed of light = 3 x10^8 m/s

lamda = wavelngth = 470 nm = 470 x 10^ -9 m

Now Eenrgy = ( 6.625x10^ -34 ) x ( 3 x 10^8) / ( 470x10^-9)

= 4.23 x 10^ -19 Joules

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