The Origins and Evolution of the Isoelectronic Principle (pp. 317-325)
Authors: William B. Jensen
Abstract: One of the most important by-products of the rise of the electronic theory of bonding and structure in the 20th century is the so-called isoelectronic principle. Not only does this principle underlie the periodic table, it has also served as a guide for the interpretation of spectra and, under a variety of names, as a rich source of analogies for the synthesis of new compounds and the systematization of their structures. Among Henry Bentís many accomplishments was his early recognition of the central importance of this principle and his authorship of the first definitive review to explicitly deal with its many ramifications and applications. Consequently, it was thought appropriate to honor him by briefly outlining the historical origins and evolution of this key chemical concept.