Showing papers by "Lester Andrews published in 1969"
TL;DR: In this article, the potential constants FO−O,LiO 2,LiO 3,FLi−O and FLi-O were derived from six isotopic molecules, and the oxygen−oxygen force constant for LiO 2 coincides with that calculated for O2−, suggesting that the LiO2 molecule is highly ionic and may be considered as a lithium cation bonded to a superoxide anion by Coulombic forces.
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 identity and indicate an isosceles triangular structure. Eighteen frequencies from six isotopic molecules determine the potential constants FO–O = 5.59 ± 0.05, FLi–O = 1.18 ± 0.02, and FLi–O,Li–O = − 0.21 ± 0.03 mdyn / A. The oxygen–oxygen force constant for LiO2 coincides with that calculated for O2−, which suggests that the LiO2 molecule is highly ionic and may be considered as a lithium cation bonded to a superoxide anion by Coulombic forces.
145 citations
92 citations
TL;DR: In this paper, it was shown that CH2I2 diluted in argon with 6Li, 7Li, Na, or K atoms produces new infrared absorptions attributable to the alkali iodide and the CH 2I free radical.
Abstract: The codeposition of CH2I2 diluted in argon with 6Li, 7Li, Na, or K atoms produces new infrared absorptions attributable to the alkali iodide and the CH2I free radical. The identity of the radical is confirmed by reacting the CHDI2, CD2I2, and CH2IBr precursors with alkali atoms. Absorptions assigned to the symmetric H–C–H bend, the symmetric C–I stretch, and the out‐of‐plane hydrogen bend are supported by vibrational analysis. The high C–I force constant (2.81±0.04 mdyn/A) indicates pi bonding in CH2I.
74 citations
15 citations