Biologically active Cu(II) and Fe(III) complexes of a phenothiazine derivative with an extended coordination sphere.: Solution structures

Copper and iron complexes of N-[alpha-benzoyl-amino-beta-(10-metyl-3-phenothiazinyl)-acriloyl)-phenylhydrazine were prepared and dissolved in DMF. The corresponding solution structures were established using EPR and electronic spectroscopy. In the case of the copper complexes various four-co-ordinate Cu(II) species with distorted square-planar geometry around the metal ion are established, while two high-spin Fe3+ species with octahedral co-ordination and different rhombicity have been put into evidence for the iron complexes. The solution structures are compared with the analytical data of the parent complexes in the solid state.