The electronic structure of trifluorobenzoylacetonates of Al(III), Ga(III)and In(III)

In order to investigate the electronic effects of the substitution of trifl uoro and phenyl groups on diketonates chelate rings we have measured the ph otoelectron and absorption electron spectra of the trifluorobenzoylacetonat es of aluminum, gallium and indium. The electronic structure of these compo unds and the Al, Ga, In trifluoroacetylacetonates and their benzoylacetonat es in the ground, excited and ionized states (PM3/CI method) was calculated . This was done using experimental and theoretical ionization energies, exc iting energies along with the nature of corresponding ionized and excited s tates from which spectral interpretations are proposed. On the strength of obtained results we have established the main patterns o f electronic structure and changes in the spectra of the studied beta-diket onates depending on the functional groups and the central atom. (C) 1998 El sevier Science B.V. All rights reserved.