We have developed and synthesized a tridentate pincer ligand precursor, which possesses two oxygen- and one nitrogen-donor functionalities (ONO), based on a bis-imidazole precursor. The tridentate ONO ligand, <b>1</b>, incorporates a carbonyl-substituted imidazole functionality. We have prepared a flexible ligand system by employing the starting material 2,6-(dibromomethyl)pyridine to introduce a methylene linker into the pincer ligand precursor. We have metallated these ligand precursors to form cobalt(II), nickel(II) and copper(I) complexes that contains this tridentate ligand. A detailed description of the preparation and characterization (NMR Spectroscopy) of the ligand precursor and of the metal complexes, will be presented.

First-row transition metal ONO pincer complexes based on a bis-imidazole precursor

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