Abstract
Cahn, in his News and Views article1, wondered why an arsenic-boron pair is best suited to ‘stuff’ a double vacancy in the crystal lattice in preference to a pair of boron atoms or arsenic atoms. The answer can be found if to describe bonding Linnett's model2 for the covalent chemical bond is used. This is a generalization of the electron-pair idea which incorporates the Pauli and Ruedenberg principles and accounts well for molecular structures without resonance or configuration interaction.
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References
Cahn, R. W. Nature 389, 121 (1997).
Linnett, J. W. The Electronic Structure of Molecules. A New Approach (Methuen, London, 1964).
Oreskes, N., Shrader-Frechette, K. & Belitz, K. Science 263, 641 (1994).
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van der Put, P. Electron pairs shed light on frustrated percolation. Nature 392, 29–30 (1998). https://doi.org/10.1038/32071
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DOI: https://doi.org/10.1038/32071
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