Oxidative Degradation of β-Diketiminate Ligand in Copper(II) and Zinc(II) Complexes

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Abstract
Copper(II) and zinc(II) complexes supported by a popular β-diketiminate ligand (1-, 2-mesitylamino-4-mesitylimino-2-pentene), [CuII(1)(AcO)] and [{ZnII(1)}2(μ-MeO)(μ-AcO)], have been demonstrated to undergo an oxidative degradation to give a ketone diimine derivative (2) under aerobic conditions. The crystal structures of the mononuclear copper(II) and dinuclear zinc(II) complexes of the β-diketiminate ligand as well as the copper(II) complex of the modified ligand have been determined by X-ray crystallographic analysis. Mechanism for the oxidative degradation reaction of the β-diketiminate ligand is also discussed.