INFRARED SPECTRUM, STRUCTURE, VIBRATIONAL POTENTIAL FUNCTION AND BONDING IN THE LITHIUM SUPEROXIDE MOLECULE, $LiO_{2}$.
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Date
1969
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Ohio State University
Abstract
Lithium superoxide has been synthesized by reacting lithium atoms and oxygen molecules at high dilution in inert and oxygen matrices. Isotopic substitution at all atomic positions and use of isotopic mixtures verify the molecular identify and indicate an isosceles triangular structure. Eighteen frequencies from six isotopic molecules determine the potential constants $F_{O-O}=5.59\pm0.05, F_{Li-O}=1.18\pm0.02$ and $F_{Li-O.LiO}=-0.21\pm0.03 mdyn/\AA$. The oxygen-oxygen force constant for $LiO_{2}$ coincides with that calculated for $O_{2}^{-}$ which suggests that the $LiO_{2}$ molecule is highly ionic and may be considered as a lithium cation bonded to a superoxide anion by coulombic forces.
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Author Institution: Chemistry Department and Centre for Advance Studies, University of Virginia