Abstract
A new method of estimating bond energies is applied to 115 gaseous, liquid, and solid compounds with generally good agreement between experimental and calculated values. The method depends in some applications on evaluation of homonuclear single covalent bond energies not experimentally measurable; a means of such evaluation for major group elements is described, and the periodicity of their bond energies is demonstrated. In general, the total bond energy can be calculated as the sum of a covalent contribution and an ionic contribution. The covalent contribution is calculated from homonuclear single bond energies and bond length. The ionic contribution is calculated simply from Coulomb's law. The relative weights of these contributions are evaluated from the partial charges calculated from the principle of electronegativity equalization. The results permit new insight into the nature of chemical bonding, and especially suggest the possibility of significant improvement over the ionic model for solids.
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