3-PICOLYLAMINE AND 4-PICOLYLAMINE COMPLEXES OF BIVALENT-METAL HALIDES AND PSEUDOHALIDES

Coordination compounds formed by the interaction of some bivalent metal halides and pseudohalides with the potentially bidentate ligands, 3-picolylamine and 4-picolyl-amine, have been prepared and characterized by molecular conductance, magnetic susceptibility, electronic and i.r. spectral measurements in the solid state. The i.r. spectral studies indicate that, in addition to their monodentate bonding through pyridine ring nitrogens, these ligands also bond through their amino nitrogen and, in some cases, act as bidentate bridging or chelating ligands. Tentative stereochemistries of the complexes isolated in the solid state are discussed. The ligand field parameters 10 Dq, B, Dq/B, β and v2/v1 are calculated for the cobalt(II) and nickel(II) complexes and are consistent with their proposed stereochemistries. © 1979 Verlag Chemie, Gmbh.