Chemical reactions are defined usually in small contexts (only up to a small number of neighbouring atoms), such generalizations are a matter of utility. The preferential outcome of one instance of a generalized reaction over a set of other plausible reactions, is defined as chemoselectivity. Practicing chemists typically try to predict whether or not an instance of a particular generalized reaction will yield product based on the molecular connectivity alone. Such predictions based on connectiv… (More on Chemoselectivity)