Abstract
The method of moments is used to look at an old problem in organic chemistry, namely the site specificity of electrophilic aromatic substitution. By plotting the energy difference curves between the various Wheland intermediates as a function of electron count, the topological aspects of the problem become very clear. It is shown how the fundamental electronic driving force for the selectivity is related via the moments approach to other important theoretical ideas, such as Walsh's rules and the Woodward-Hoffmann rules.
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