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BY-NC-ND 3.0 license Open Access Published by De Gruyter June 2, 2014

On Drago's E-C Equation, Pearson's HSAB Rule and the Ionic Approximation to Chemical Bonding

  • G. Van Hooydonk

Abstract

An attempt is made to explain the E-C formalism for ionic interactions in terms of the ionic approximation to chemical bonding. Dravo's E-C equation is seen to be a first approximation to the bond energy equation as it is given by the ionic bonding approach. The meaning of the ratio C/E is discussed and its relation with the hardness and softness of interacting species, as these occur in Pearson's HSAB rule, shows that the electron affinity or electronegativity of elements completely determines the chemical behaviour of ionic species. This analysis illustrates the consistency of the ionic approximation to chemical bonding.

Received: 1974-11-28
Published Online: 2014-6-2
Published in Print: 1975-2-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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