Hi everyone,
I am trying to calculate vibrational energy levels(v=0,1,2,3,...) of H2 molecule in its ground electronic state. I used Opt Freq commands in Gaussian 09 which gave me fundamental frequency at 4657.1289 cm-1, which would correspond to v=0 level. But I do not know how to calculate energies for v=1,2,3.., i.e. for excited states of the same electronic ground state. Could anyone help me out here. I want the energy levels for each v as shown in the uploaded image.
Thanks in advance.