title: Use of the 2-Pyridinealdoxime/N,N'-Donor Ligand Combination in Cobalt(III) Chemistry: Synthesis and Characterization of Two Cationic Mononuclear Cobalt(III) Complexes.
abstract: The use of 2-pyridinealdoxime (paoH)/N,N'-donor ligand (L-L) "blend" in cobalt chemistry has afforded two cationic mononuclear cobalt(III) complexes of the general type [Co(pao)(2)(L-L)](+), where L-L = 1,10-phenanthroline (phen) and 2,2'-bipyridine (bpy). The CoCl(2)/paoH/L-L (1 : 2 : 1) reaction system in MeOH gives complexes [Co(III)(pao)(2)(phen)]Cl.2H(2)O (1.2H(2)O) and [Co(III)(pao)(2)(bpy)]Cl.1.5MeOH (2.1.5MeOH). The structures of the complexes were determined by single-crystal X-ray crystallography. The Co(III) ions are six-coordinate, surrounded by three bidentate chelating ligands, that is, two pao(-) and one phen or bpy. The deprotonated oxygen atom of the pao(-) ligand remains uncoordinated and participates in hydrogen bonding with the solvate molecules. IR data of the complexes are discussed in terms of the nature of bonding and the known structures.
authors: Department of Chemistry, University of Patras, 26500 Patras, Greece.
authors: Konstantis F
authors: KF
authors: Konidaris
authors: Catherine P
authors: CP
authors: Raptopoulou
authors: Vassilis
authors: V
authors: Psycharis
authors: Spyros P
authors: SP
authors: Perlepes
authors: Evy
authors: E
authors: Manessi-Zoupa
authors: Theocharis C
authors: TC
authors: Stamatatos