Using a dinucleating trianionic phosphinoamide ligand, a heterobimetallic complex featuring a direct metal-metal (M-M) bond between Ti and Fe is synthesized, along with its one-electron oxidized and reduced redox counterparts. The Ti-Fe complexes feature bonds that are shorter than the sum of the metallic radii, demonstrating that there is a significant M-M interaction which can be described as either a covalent bond or strong dative interaction between Ti(III) or Ti(IV) metalloligands, respectively. Using a suite of physical characterization methods, including Mössbauer, EPR, and X-ray absorption spectroscopies, as well as quantum chemical calculations, the metal oxidation state and bonding description of the Ti-Fe bimetallic complexes are elucidated.

Nature of the chemical bonding in Ti-Fe bimetallic complexes

254th National Meeting (2017)

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