We have developed and synthesized a series of tridentate pincer ligands 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 through the use of 2,6-dibromopyridine as a ligand precursor. We have also prepared more flexible ligand systems by employing the starting material 2,6-(dibromomethyl) pyridine to introduce a methylene linker into the pincer ligand. We have metallated these ligand precursors to form zinc(II) and copper(II) complexes containing these tridentate ligands. We are interested in preparing ligand precursors based on 1,2,4 triazoles instead of 1,3,4 triazoles, which were previously prepared in the Miecznikowski Laboratory. We have metallated the novel ligand precursors with zinc(II) and copper(II) salts. A detailed description of the syntheses and characterization (NMR spectroscopy, ESI-Mass spectrometry, and single crystal structures) of the SNS zinc(II) and copper(II) complexes and ligand precursors will be presented.

Synthesis and characterization of SNS pincer ligand precursors and corresponding zinc(II) and copper(II) complexes

253rd National Meeting (2017)

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