Journal of the Chemical Society - Faraday Transactions p. 2801 - 2804 (1990)
Update date:2022-08-30
Topics:
Griffiths, William J.
Harris, Frank M.
Parry, David E.
A double-charge-transfer spectroscopy study has provided evidence for the existence of four low-lying electronic states of the CH3I2+ ion, the double-ionization energies to which are 27.0 +/- 0.3, 29.6 +/- 0.3, 31.3 +/- 0.5 and 36.5 +/- 0.5 eV.Three of these energies agree, within experimental error, with those determined previously in a dissociative double photoionization study of CH3I.The present investigation reveals for the first time the state at 29.6 eV.The value of the double-ionization energy to the ground triplet state, calculated in the present investigation using the single-determinant Hartree-Fock approximation to the many-electron wavefunction with corrections of second-order Moeller-Plesset perturbation theory for correlation effects, is 25.80 eV, somewhat lower than the measured value of 27.0 eV.
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