E. Funck, A. Jungermann, W. Klee
1977
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Journal
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Abstract
Abstract Polarized i.r. reflection spectra of single crystals of Li-2,4-pentanedionate (Li-acac) were recorded in the region from 200–600 cm −1 . Bands due to vibrations of the lithium ions were identified using the 6 Li/ 7 Li isotopic replacement technique. Various LiO distances as well as different degrees of distortion in the four symmetrically unequal LiO 4 coordination polyhedra lead to a specific spectroscopic behaviour for each of these polyhedra. It is therefore possible to suggest an assignment of the observed LiO bands to specific LiO 4 groups. The results of a rough calculation support this assignment. A correlation between LiO distances and LiO stretching force constants is proposed.