Interpretation of the IR spectra of aluminum, gallium, and indium tris(acetylacetonates)

The IR spectra of M(Acac) 3 (M = Al, Ga, and In; Acac −1 is the acetylacetonate ion) and their isotope-substituted analogs were calculated by the Hartree-Fock-Roothaan method. The results obtained and available literature data were used to assign the absorption bands. A correlation was found between the force constants of the M-O bond and the stability constants of the complexes M(Acac) 3 .