Abstract
Polarized spectra, 4–300°K and 9–30 kK, are presented for single crystals of vanadyl bis acetylacetonate and vanadyl bis benzoylacetonate, which have different crystal packing and molecular symmetries but similar coordination features. When analyzed according to molecular axes, the two systems display very similar spectra; neither exciton effects nor moderate differences in molecular symmetry and substituents appear very important. Special care taken to achieve resolution succeeded in revealing considerable structure on bands I (10.5–16 kK) and III (22–28 kK), but none on band II (16–20 kK). Assignments and other implications of the polarizations and structure are discussed.
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