Details

Autor(en) / Beteiligte

• Malaestean, Iurii L.
• Speldrich, Manfred
• Baca, Svetlana G.
• Ellern, Arkady
• Schilder, Helmut
• Kögerler, Paul

Titel

Diphenic Acid‐Based Cobalt(II) Complexes: Trinuclear and Double‐Helical Structures

Ist Teil von

• European Journal of Inorganic Chemistry, 2009-03, Vol.2009 (8), p.1011-1018

Ort / Verlag

Weinheim: WILEY‐VCH Verlag

Erscheinungsjahr

2009

Link zum Volltext

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• The linear trinuclear complex [Co3(dpa)2(Hdpa)2(1‐MeIm)2(H2O)2] (1) and the two‐dimensional coordination polymer [Co2(dpa)2(pyz)]n (2; H2dpa = diphenic acid, 1‐MeIm = 1‐methylimidazole, pyz = pyrazine) exemplify the versatile coordination chemistry of diphenic acid in conjunction with N‐donor ligands. Complex 1 consists of a discrete arrangement of three CoII atoms bridged by four diphenate ligands, whereas complex 2 contains a network of dinuclear CoII units bridged by two diphenate ligands to form double‐helical chains, which are further connected via pyrazine molecules into two‐dimensional sheets. A magnetochemical analysis of these complexes reveals both strong ligand field effects on the CoII 4F free ion ground state and ferro‐ and antiferromagnetic exchange contributions mediated by the dpa ligands. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) Ferro‐ and antiferromagnetic exchange results from different coordination modes of diphenic acid (H2dpa) to CoII, as showcased by the linear complex [Co3(dpa)2(Hdpa)2(1‐MeIm)2(H2O)2] and the two‐dimensional coordination polymer [Co2(dpa)2(pyz)]n, which features double‐helical strands (1‐MeIm = 1‐methylimidazole, pyz = pyrazine).