Details

Autor(en) / Beteiligte

• Noamane, M.H.
• Ferlay, S.
• Abidi, R.
• Kyritsakas, N.
• Hosseini, M.W.

Titel

Formation of binuclear neutral Copper(II) complexes based on p-tert-butyl- calix[4]arene and thiacalix[4]arene in 1,3-A conformation bearing four catechols at their lower rim

Ist Teil von

• Inorganica Chimica Acta, 2017-11, Vol.468, p.260-269

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The synthesis and binding propensity towards copper of new ligands based on calix[4]arene and thiacalix[4]arene backbones in 1,3-Alternate conformation bearing four iminocatechol coordinating units are described. [Display omitted] •Calix[4]arene and thiacalix[4]arene multivalent ligands in 1,3-Alternate conformation.•Macrocyclic ligands with four divergently disposed iminomethyl-catechol units.•Binuclear Copper(II) complexes with 03N deformed square planar coordination sphere.•Binding propensy: solid-state study and behaviour in solution. Two new multivalent ligands 1 and 2, based on calix[4]arene and thiacalix[4]arene backbones in 1,3-Alternate conformation, bearing four iminocatechol coordinating units have been prepared and structurally characterized both in solution and in the crystalline phase. Combinations of compounds 1 and 2 with Cu(II) afford neutral binuclear complexes 1-Cu2 and 2-Cu2, characterized in the solid state. In both cases, the metal centre, surrounded by a O3N set of heteroatoms, adopts a deformed square planar coordination geometry. In solution, the propensity of ligands 1 and 2 to bind M2+ cations ((M=Co, Ni, Cu and Zn) was also demonstrated. In 1/1 MeOH/CHCl3 mixture and at room temperature, the following stability sequence Ni2+<Zn2+<Co2+≪Cu2+ was observed for both binuclear 1-M2 and 2-M2 complexes.