Transition Metal Chemistry of Oxime Containing Ligands. XXIX. Cobalt (II) Complexes of 2,6-Diacetylpyridine Dioxime

Abstract

Complexes of cobalt(II) with the tridentate oxime ligand 2,6-diacetylpyridine dioxime were isolated and characterized by elemental analysis, conductance measurements, magnetic susceptibilities (from room temperature to liquid N₂ temperature), diffuse reflectance and infrared studies. On the basis of these studies a distorted trigonal-bipyramidal structure for [Co(H₂dapd)X₂] (X = Cl⁻, Br⁻ or I⁻) and a distorted octahedral structure involving bridging anions for [Co(H₂dapd)X₂] (X = NCS⁻ or NCSe⁻) are suggested. The compound [Co(H₂dapd)(NO₃)₂] is also a distorted octahedral complex involving both monodentate and bidentate nitrate groups. The complex [Co(H₂dapd)₂] (C10₄)₂ involves a distorted octahedra1 cation.