Ionization Potentials of Carbonyl Molecules


THE first ionization energies of carbonyl molecules are largely determined by the non-bonding electrons at the oxygen atom of the carbonyl group. If electric charge flows from the other part of the molecule into the oxygen, the effective electro-negativity of that atom will become decreased, and hence the ionization potential of the molecule will be reduced1. From this point of view, it is expected that the magnitude of the ionization potential will serve as a clue to the state of electron transmission in a carbonyl molecule.

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  1. 1

    Coulson, C. A., “Valence”, 186 (Oxford, 1952).

  2. 2

    Omura, I., Higasi, K., and Baba, H., Bull. Chem. Soc. Japan (in the press).

  3. 3

    Honig, R. E., J. Chem. Phys., 16, 105 (1948).

  4. 4

    Ingold, C. K., “Structure and Mechanism in Organic Chemistry”, 71 (Ithaca, 1953).

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