S. Shaik, A PRIMER FOR VALENCE-BOND MIXING AND AVOIDED CROSSING - GENERAL PARADIGMS IN CHEMICAL-REACTIVITY, Journal of molecular liquids, 61(1-3), 1994, pp. 49-79
A curve crossing diagram is a model for the construction of energy pro
files by means of valence bond mixings and avoided crossings. The key
principles of the model and its applications to reactivity patterns. r
eaction mechanisms and structural trends, are reviewed.