Increased-Valence Structures Constructed from Lewis Structures: Delocalization of Lone-Pair Electrons into Vacant Bonding Orbitals
For diamagnetic polyatomic molecules, it is very easy to write down standard Lewis structures that have electron-pair bonds and lone-pairs of electrons. It is then also easy to generate “increased-valence” structures from them. To do this, we must delocalize one or more lone-pair electrons into either two-centre bonding orbitals or two-centre antibonding orbitals, both types of orbitals being vacant in the standard Lewis structures. In this chapter, we shall describe these delocalizations into bonding orbitals in some detail.
KeywordsFluorine Atom Formal Charge Lewis Structure Atom Electronegativity Bonding Unit
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