A new approach to the synthesis of gallium(III) complexes with α-diimine ligands in the radical anion form

A convenient method for the synthesis of gallium(III) complexes with α-diimine ligands DABMe,Mes (N,N′-(butane-2,3-diylidene)bis(2,4,6-trimethylaniline)) or BIANDipp (1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) in the radical anion form is found. The method includes the reaction of complexes [Co(DABMe,Mes)Cl2] and [Co(BIANDipp)Cl2] with gallium resulting in the transmetallation and one-electron reduction of the ligand. The synthesized complexes [Ga(DABMe,Mes)Cl2] and [Ga(BIANDipp)Cl2] are characterized by X-ray diffraction analysis and EPR spectroscopy.