A family of mononuclear CoIII/2-pyridyloximate complexes and their conversion to trinuclear, mixed-valence linear CoII/III3 clusters

The use of the 2-pyridyl oxime ligands (LH) 2-pyridinealdoxime, methyl 2-pyridyl ketone oxime and phenyl 2-pyridyl ketone oxime in Co chemistry has been investigated and led to two families of compounds. The first family includes the mononuclear octahedral, low-spin complexes [CoIII(L)3], while the second family consists of the trinuclear, mixed-valent linear clusters [CoIII2CoII(L)6]X2 (X = ClO4-, PF6-). The latter are prepared by the reactions of the former with an appropriate CoII source. The structural, physical and spectroscopic properties of the complexes are described.

A family of new linear, trinuclear mixed-valence CoIIICoIICoIII clusters have been synthesized using 2-pyridyloximato ligands; the mononuclear “ligand” CoIII units of the trinuclear clusters have been also prepared and characterized.Figure optionsDownload as PowerPoint slide