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Copper(II)-Complexes of an Isatinic Quinolyl Hydrazone-Anion effect

New heteroleptic copper(II)- complexes (1:1 or 1:2; M:L) were obtained from the reaction of an isatinic quinolyl hydrazone (H 2L) with several copper(II)- salts viz. Cl - , Br - , NO 3 - , ClO 4 - , SO 4 2- and AcO - . The obtained complexes have O h, square planar (D 4h - symmetry) and square pyramid arrangements. The complexes fulfill the strong coordinating ability of Cl�, Br �, NO 3� and SO 4 2- anions. Depending on the type of the anion, the ligand coordinates the copper(II)- ions either through its lactam (SO 4 2- and ClO 4 - ) or lactim forms (the others). For the copper(II)- isatinic complexes the antimicrobial activit shows a gradual change with change of the coordinated anions. Also, depending on the type of the anion, the order of the antimicrobial activity is as follows Cl - > SO 4 2- > Br - .