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Copper(II) complexes of compartmental ligands: structural and stoichiometric aspects depending upon the anionic group of the copper salt

Medici, Serenella and Peana, Massimiliano Francesco and Solinas, Costantino and Zoroddu, Maria Antonietta (2012) Copper(II) complexes of compartmental ligands: structural and stoichiometric aspects depending upon the anionic group of the copper salt. In: Copper in biology: 8. International copper meeting, 30 September -5 October 2012, Alghero, Italy. [S.l.], [s.n.]. p. 66, P30. Conference or Workshop Item.

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Abstract

It has been found that anionic species of metal salts can lead to different geometries and stoichiometries in the synthesis of coordination compounds. Therefore, using the same cation but different polyatomic anion groups such as oxalate, sulfate, acetate, oxamate etc. [1], it is possible to obtain metal complexes with various structural and stoichiometric features upon coordination. In fact, these anionic groups can behave themselves, generally, as mono-, bidentate and bridgedbidentate ligands towards metal ions. In the last years, with the aim to design a multi-dentate ligand capable of supporting simultaneous coordination to three copper atoms and to mimic the multicopper active sites of blue copper oxidases (e.g., laccase, ascorbate oxidase and ceruloplasmin), we focused our studies on the synthesis and structural characterization of copper(II) complexes of compartmental acyclic bis(salicylhydrazone) ligands derived from iminoand methyl-iminodiacetic acid, finding a different behaviour using copper(II) sulfate, perchlorate and acetate salts. Thus, we have obtained, with a 1:3 (ligand-to-metal) molar ratio, a trinuclear coordination polymer from Cu(II) perchlorate [2], a sulfato-bridged hexanuclear dimer [3] and a mononuclear complex using Cu(II) acetate [4]. Microbiological investigations showed a good activity of the sulfato and perchlorato complexes. Studies concerning DNA binding of these compounds are now in progress.

Item Type:Conference or Workshop Item (Poster)
ID Code:8918
Status:Published
Uncontrolled Keywords:Copper(II) complexes, compartmental ligands, structure
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Area 03 - Scienze chimiche > CHIM/01 Chimica analitica
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
Publisher:[s.n.]
Deposited On:08 May 2013 08:09

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