Copper-mediated oxygenation of flavonolate in the presence of a tridentate N-ligand.: Synthesis and crystal structures of [Cu(fla)(idpaH)]ClO4 and [Cu(idpaH)(O-bs)]ClO4, [fla = flavonolate, idpaH=3,3′-iminobis(N,N-dimethylpropylamine), O-bs = O-benzoylsalicylate]

The complexes [Cu(fla)(idpaH)] ClO4 (4) and [Cu(idpaH)(O-bs)] ClO4 (5) (fla = flavonolate, idpaH = 3,3'-iminobis(N, N-dimethylpropylamine), O-bs = O-benzoylsalicylate) have been synthesised and characterised. Complex 5 can be obtained also by the oxygenation of 4 and concomitant CO release. The structures of the compounds have been determined by X-ray diffraction. Complex 4 exhibits distorted trigonal-bipyramidal geometry around the copper(II) ion while complex 5 is distorted square-pyramidal. (C) 2000 Elsevier Science S.A. All rights reserved.