Abstract
The modified CNDO method of Del Bene and Jaffé has been applied to the study of the phosphorescence spectra of some carbonyl compounds, namely, benzaldehyde, acetophenone, propiophenone, and various forms of the β-diketone studied in the first paper of this series: the keto form and two chelated enol forms of benzoylacetone. The results are quite satisfactory. The phosphorescence spectra of the carbonyl compounds and the keto form of benzoylacetone has been assigned to a n → π* transitions whereas the phosphorescence spectrum of the preponderant chelated enol form of benzoylacetone has been assigned to a π → π* transition.
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