Gilbert N. Lewis, Prof. of Physical Chemistry at U.C. Berkeley, 1912-1946, has published seminal papers about the chemical bond, and 1916, the famous book "The Atom and the Molecule". His model is now 100 years old and has changed little over time. It is a structural tool. Lewis tried in vain to give it quantitative significance.|
George E. Kimball, Prof. of Physical Chemistry at Columbia University, NY, 1947-1956, is a.o. well known to the older generation of physical chemists through his co-authorship of H.Eyring, J.Walter & G.E.Kimball: "Quantum Chemistry", J.Wiley, N.Y., 1944.
1957 Kimball and G.F. Neumark  proposed to describe the observable three-dimensional electron density of a ground state molecule or extended structure using only s-type functions i with different expectation radii
From Wikipedia: G.E. Kimball died 1967, only 61 years old. He had left his professorship at Columbia 1956 to work full-time as a pioneer in Operations Research for Arthur D. Little, from 1961 as Vice President.-
It is a pity that Kimball's work with his Columbia doctorands is only marginally documented in the literature. This has led to a proliferation of qualitative "Kimball" and "Tangent Sphere" models of dubious quality by authors who have not understood the basic theory. The model must exclusively be used in a quantitative context.
|The aim of these pages is to restore awareness for the original quantitative Kimball model applied a.o. to Lewis' structures, and also to reflect on bygone decades of teaching chemistry.|