The energy of the first excited levels of benzene is calculated by the method of antisymmetrized molecular orbitals. The results predict two weak bands, due to forbidden electronic transitions, at λ = 2500 and λ = 2100 and a strong band at λ = 1500. No empirical data except the carbon‐carbon distance in benzene were used.
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Handbuch der Physik, Vol. 24, No. 2, p. 143.
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The two parameters are the difference between the Coulomb energy of a polar and a nonpolar state and the resonance integral Their values were estimated from the absorption frequency of pentene 2 (since cyclohexene has not been measured), and from the resonance of cyclohexene. States like “see the artwork from the pdf” and “see the artwork from the pdf” were omitted since they introduced new variables and complicated the determinant.
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© 1938 American Institute of Physics.
1938
American Institute of Physics
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