Lithium cation affinities

The study of the interactions between organic compounds and aUtali-metal cations, in the gas phase, is related to many topics such as ion solvation, catalysis and molecular recognition. Furthermore, mass spectrometry has been used for the analyses of organolithium compounds and supramolecular assemblies that contain lithium cations. Alkali cationization is an important ionization technique, implemented for the analyses of a wide range of organic compounds. Finally, gas-phase studies are also useful for the quantitative determination of lithium cation affinity. The interaction between lithium cation and organic substances is thus related to different aspects of gas-phase chemistry and mass spectrometry. 

A comparison of calculated and experimentally measured lithium cation affinities, e.g., energies (enthalpies) where E+ is Li+, is provided in Table 6-7. The usual selection of models has been surveyed, except that AMI has not been parameterized for lithium. 

Rodger MT, Armentrout PB. A critical evaluation of the experimental and theoretical determination of lithium cation affinities. Int J Mass Speetrom. 2007 267 167-82, and references therein. 

Table 6.3 Lithium cation affinity (LiCA) and basicity (LiCB) scales (kj mol j-... 

Abboud, J.L.M., Yanez, M., Elguero, J. et al. (1992) A comparative study of lithium cation affinities of alcohols and ethers and proton affinities of lithium alkoxides. New J. Chem., 16, 739-745. 

Tsang, Y., Sin, F.M., Ma, N.L. and Tsang, C.W. (2002) Experimental validation of Gaussian-3 lithium cation affinities of amides implications for the gas-phase lithium cation basicity scale. Rapid Commun. Mass Spectrom., 16, 229-237. 

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