Lewis-Gillespie

Fig. 24 A—C. Lewis-, Gillespie-, and Sidgwiek-type lone pairs...

Gillespie, R. J. Popelier, P. L. A. Molecular Geometry and Chemical Bonding jrom Lewis to Electron Densities Oxford University Press New York, 2001. 

Chemical bonding and molecular geometry from Lewis to electron densities / R.J. Gillespie, P.L.A. Popelier. 

Gillespie, S.H. (1993) The clinical spectrum of human toxocariasis. In Lewis, J.W. and Maizels, R.M. (eds) Toxocara and Toxocariasis Clinical, Epidemiological and Molecular Perspectives. Institute of Biology, London, pp. 55-61. 

I. Vastrik, P. D Eustachio, E. Schmidt, G. Joshi Tope, G. Gopinath, D. Croft, B. de Bono, M. Gillespie, B. Jassal, S. Lewis, L. Matthews, G. Wu, E. Birney, and L. Stein, Reactome A knowledge base of biologic pathways and processes. Genome Biol 8(3), R39 (2007). 

It was indeed found necessary to have excess antimony pentafluoride present in order to obtain stable alkylcarbonium hexafluoroantimonate complexes. Antimony pentafluoride is a liquid Lewis acid fluoride (b.p. 148-150°) of low dielectric constant (e 3), which has been shown by fluorine N.M.R. studies in the pure liquid state and in solution to exist in both cyclic and acyclic polymeric forms involving fluorine bridges. The antimony is in approximately octahedral co-ordination with predominant bridging by coordinating fluorines (Gillespie and Rothenbury, 1963). As fluorine generally does not show bridging properties, the structure of antimony pentafluoride itself indicates the very... 

A general discussion of Lewis acids and bases is given by R. J. Gillespie in Friedel-Crqfts and Related Reactions, Vol. 1, G. A. Olah, Ed., Wiley-Interscience, New York, 1963, p. 169. 

Lewis and Bigeleisen,71 who first determined the Hammett acidity function values for oleums, used a method to derive them from the vapor pressure measurements. Brand et al.,72 however, subsequently by the use of nitro compound indicators showed that the H0 values are not directly related to the vapor pressure. The most accurate Ho values for oleums so far have been published by Gillespie et al.7 (Table 2.4). 

Transferability of ionic domains The Lewis S4)-Sidgwick-Powell 66)-Gillespie-Nyholm S6> rule... 

Valence shell electron pair repulsion theory (VSEPR) provides a method for predicting the shape of molecules, based on the electron pair electrostatic repulsion. It was described by Sidgwick and Powell" in 1940 and further developed by Gillespie and Nyholm in 1957. In spite of this method s very simple approach, based on Lewis electron-dot structures, the VSEPR method predicts shapes that compare favorably with those determined experimentally. However, this approach at best provides approximate shapes for molecules, not a complete picture of bonding. The most common method of determining the actual stmctures is X-ray diffraction, although electron diffraction, neutron diffraction, and many types of spectroscopy are also used. In Chapter 5, we will provide some of the molecular orbital arguments for the shapes of simple molecules. 

Gillespie, Ronald J., and Paul L. A. Popelier. Chemical Bonding and Molecular Geometry Prom Lewis to Electron Densities. Topics in Inorganic Chemistry. New York Oxford University Press, 2001. 

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