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2,6-Diphenylpyridine is used as a tridentate [C?N?C] dianionic ligand in organogold(III) chemistry, an intermediate. It readily adds an electron from alkali metals in THF to give a radical anion which is a powerful reducing agent.
Matthew Polson; Sandro Fracasso; Valerio Bertolasi; Marcella Ravaglia; and Franco Scandola. Iridium Cyclometalated Complexes with Axial Symmetry. Synthesis and Photophysical Properties of a trans-Biscyclometalated Complex Containing the Terdentate Ligand 2,6-Diphenylpyridine. Inorg. Chem. 2004, 43 (6), 1950-1956.
Kar-Ho Wong; Kung-Kai Cheung; Michael Chi-Wang Chan; and Chi-Ming Che. Application of 2,6-Diphenylpyridine as a Tridentate [C?N?C] Dianionic Ligand in Organogold(III) Chemistry. Structural and Spectroscopic Properties of Mono- and Binuclear Transmetalated Gold(III) Complexes. Organometallics. 1998, 17 (16), 3505-3511.
Readily adds an electron from alkali metals in THF to give a radical anion which is a powerful reducing agent: e.g. reacting with benzophenone to give the dianion which can be carbonated with CO2 to give benzilic acid: Bull. Soc. Chim. Fr., 1710 (1960).