Rehybridization as a general mechanism for maximizing chemical and supramolecular bonding and a driving force for chemical reactions

Dynamic variations in hybridization patterns (rehybridization) were analyzed at B3LYP/6–31G** and MP2/6–31+G* levels. Computations clearly illustrate the generality of rehybridization in a variety of chemical phenomena, which involve structural reorganization in hydrogen‐bonded complexes, nonhyperconjugative stereoelectronic effects in saturated heterocycles, Mills‐Nixon effect, and contrasting substituent effects in cycloaromatization reactions. © 2006 Wiley Periodicals, Inc. J Comput Chem 28: 373–390, 2007