Abstract
The molecules of acetylacetone, benzoylacetone, dibenzoylmethane, and thiodibenzoylmethane have been calculated by the simple MO LCAO method and their absorption spectra recorded. The chelation of acetylacetone with a hydrogen atom does not affect the energy of the first allowed transition 1A1-1B1. Calculations correctly predict the change in the energy for this transition in the Β-diketone series: acetylacetone > benzoylacetone > dibenzoylmethane > thiodibenzoylmethane; the intensity reaches a maximum value for dibenzoylmethane and dropping sharply for thiodibenzoylmethane. The secondary absorption bands for benzoylacetone and dibenzoylmethane are examined experimentally and interpreted theoretically.
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Avdeev, V.I., Shugam, E.A. & Nasirdinov, S.D. Electronic structure and absorption spectra of acetylacetone and its analogs. Theor Exp Chem 5, 396–402 (1972). https://doi.org/10.1007/BF00524567
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DOI: https://doi.org/10.1007/BF00524567