Analysis of Polarized Crystal Spectra. The Spectrum of Cobalt(III) Acetylacetonate

The analysis of broad bands in the polarized electronic spectra of transition metal ions in crystals is discussed. The band of cobalt(III) acetylacetonate due to the transition 1T1←1A1 is found to be split by the trigonal field into components at 16 200 cm—1 (1A2) and at 17 000 cm—1 (1E). The spectra indicate that the trigonal field of the free molecule is not appreciably distorted in the monoclinic crystal.