Copper(I) complexes bases on a new indazol-4,7-dione ligand

The synthesis of two new isomeric ligands, 1-(1-((2,6-diisopropylphenyl)imino)ethyl)-1H-benzo[f]indazole-4,9-dione (La) and 2-(1-((2,6-diisopropylphenyl)imino)ethyl)-2H-benzo[f]indazole-4,9-dione (Lb), and of their [Cu(I)(Lb)2] (ClO4) (1) homoleptic and [Cu(I)(Lb(PPh3)2] (ClO4) (2) heteroleptic copper(I) complex derivatives is reported. The chemical stability, and the spectroscopic and electrochemical properties of the complexes are discussed.