Infrared absorption spectra of the 18O-labeled acetylacetonates of Cr(III) and Mn(III)

S. Pinchas, Brian L. Silver, I. Laulicht

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Abstract

The 18O-induced isotopic shifts of the Cr(III) and Mn(III) acetylacetonate (of over 90 at %18O) infrared absorption bands were measured in the 400-1650-cm-1 region. The hitherto accepted assignments of these bands are discussed in the light of these measurements. It is found that the band at about 1520 cm-1 is due to C=C stretching while that at about 1570 cm-1 has a C=O stretching character. The ∼1425-cm-1 band must be due to the asymmetrical CH3 bending while the one at 661 cm-1 probably belongs to an out-of-plane deformation and that at 590 cm-1 to an M-O stretching.

Original languageEnglish
Pages (from-to)1506-1510
Number of pages5
JournalJournal of Chemical Physics
Volume46
Issue number4
DOIs
StatePublished - 1967
Externally publishedYes

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