Recently, we have developed and synthesized a series of tridentate pincer ligands, each possessing two sulfur- and one nitrogen-donor functionalities (SNS), based on bis-imidazole or bis-triazole precursors.  The tridentate SNS ligands incorporate thione-substituted imidazole or triazole functionalities.  We have prepared somewhat rigid ligand systems (figure a) through the use of 2,6-dibromopyridine as a ligand precursor.  In addition, we have prepared more flexible ligand systems by employing the starting material 2,6-(dibromomethyl)pyridine to introduce a methylene linker (figure b, c) into the pincer ligand.  We have metallated these ligand precursors to form copper(I) and (II) complexes.  A detailed description of the syntheses, characterization (X-ray diffraction, electrochemistry, UV-Vis, and EPR spectroscopy), and reactivity of the SNS copper complexes toward an oxygen atom donor will be presented.

Syntheses, characterization, and oxygen reactivity of three and five coordinate SNS copper(I) and copper(II) pincer complexes

248th National Meeting (2014)

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