Catalysis is a fundamental concept in chemical synthesis. By providing new reaction pathways with lower energetic barriers and by supplanting wasteful stoichiometric reagents, catalysts can drastically reduce the energy and material demands of chemical processes. Cyclic thioureas derived from imidazole (imidazole-2-thiones) have been recently incorporated in a variety of catalytically active metal complexes. Vital to the advancement of thione-based catalysts has been the design and synthesis of new thiones that display an array of electronic and steric properties.<br/>This project will target a novel class of imidazole-2-thiones and their transition metal complexes.Our interest in the development of these polycyclic thiones and their corresponding transition metal complexes has arisen due to their potential application in catalysis and in fluorescent devices. These new imidazol-2-thiones provides a promising framework in which the thione center is a component of an electron-rich, extended aromatic system. This feature not only tunes the donor properties of the thione, but also imposes geometric constraints on the N-substituents, influencing their steric impact. Upon the synthesis and full spectroscopic characterization of the target thiones, complexes of catalytically relevant metal centers will be reported. Understanding the chemistry of these compounds has the potential of providing relevant information for the development of new and more efficient ways of making chemical products.

Novel polycyclic thiones: Synthesis and complexation

253rd National Meeting (2017)

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