| Sumario: | Transition metal complexes bearing imine and imine derivative ligands represent a growing number of polymerization catalysts in development. The ease of synthesis and large number of structural variations which are readily accessible make these systems of great interest both academically and industrially. One subset of imine-based complexes are those which bear exocyclic functionality which can interact with Lewis acids. These systems are particularly interesting as the activation of the complex occurs remotely, away from the active center, and that the activation can proceed using stoichiometric concentrations of activators. In addition, the presence of the exocyclic functionality may present an effective method to heterogenize polymerization catalysts. In this chapter, the development of such systems and in particular ?-iminocarboxamide nickel catalysts and derivative species are discussed.
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