Abstract
Most of the “increased-valence” structures that we have discussed so far may be derived from Lewis structures by delocalizing lone-pair \( \uppi \) and/or \( {\overline{\uppi }} \) electrons into vacant bonding or antibonding orbitals. The atomic orbital overlaps that are appropriate for some of these delocalizations are shown in Figs. 1-5 and 2-4. We shall now consider a few systems whose “increased-valence” structures can be constructed by delocalizing one or more lone-pair σ electrons of a Lewis structure into bonding or antibonding σ orbitals. Some other examples will also be discussed in Chapter 20, where the theory will be presented in a slightly different form. However, the principles for both chapters are the same.
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Harcourt, R.D. (2016). Some Electron-Excess σ Bonded Systems. In: Bonding in Electron-Rich Molecules. Lecture Notes in Chemistry, vol 90. Springer, Cham. https://doi.org/10.1007/978-3-319-16676-6_19
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DOI: https://doi.org/10.1007/978-3-319-16676-6_19
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