The Saga of “Hypervalent” Molecules
In a previous work, we have outlined the Molecular Orbital-Valence Bond (MOVB) theory of chemical bonding, based on the core(C)-ligand(L) dissection.1 In previous chapters, we have applied this brand of theory to a variety of structural problems with the aim to demonstrate its conceptual and formal advantages over previous and current qualitative theoretical approaches to bonding. We now observe that the Core-Ligand (C-L) dissection allows a classification of molecules which contain an even number of valence electrons into four major types depending upon the presence or absence of electron pairs or holes in the core and/or ligand fragments in the perfect pairing (R) Configuration Wavefunction (CW) representing the entire system.
KeywordsLone Pair Core Excitation Linear Distortion Multicenter Bond Anti Bond
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