Details

Autor(en) / Beteiligte

• Costes, Jean‐Pierre
• Donnadieu, Bruno
• Gheorghe, Ruxandra
• Novitchi, Ghenadie
• Tuchagues, Jean‐Pierre
• Vendier, Laure

Titel

Di‐ or Trinuclear 3d–4f Schiff Base Complexes: The Role of Anions

Ist Teil von

• European Journal of Inorganic Chemistry, 2008-11, Vol.2008 (33), p.5235-5244

Ort / Verlag

Weinheim: WILEY‐VCH Verlag

Erscheinungsjahr

2008

Link zum Volltext

Quelle

Wiley Online Library

Beschreibungen/Notizen

• We demonstrate through structural, spectroscopic, and magnetic studies that the main factors governing the nuclearity of M–Gd (M = Cu, Ni) complexes derived from compartmental Schiff base ligands are the different affinities of the lanthanide ions for the potential ligands and anions present in the reaction medium. In the eight examples studied, there is competition between the tetradentate O2O2 coordination site of the polydentate ligand and the anionic entities brought by the gadolinium salts. The strong affinity of nitrato anions for lanthanides yields dinuclear complexes and prevents formation of trinuclear entities, whereas the use of poorly coordinating anions such as triflates may yield either dinuclear or trinuclear complexes, depending on the 3d/4f ratio.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008) 3d Schiff base complexes (3d = Cu, Ni) used as ligands react with gadolinium ions to yield dinuclear 3d‐Gd or trinuclear 3d‐Gd‐3d complexes depending on the 3d/4f ratio if poorly coordinating anions such as triflate are used, whereas the strong affinity of nitrato anions for lanthanides onlyyields dinuclear complexes regardless of the 3d/4f ratio.