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Polynuclear Complexes of Nickel(II) with Cyanide as Bridging Ligand

Z. Smékal, F. Březina, Z. Šindelář, R. Klička, and M. Nádvorník

Department of Inorganic and Physical Chemistry, Faculty of Natural Sciences, Palacký University, CZ-771 47 Olomou


Abstract: The complexes of the types [NiL2][Ni(CN)4] . xH2O (L = 1,2-diaminopropane (1,2-pn), x = 1; L = 2,2'-bipyridine (bpy), x = 2; L = o-phenanthroline (phen), x = 2), [NiL][Ni(CN)4] . xH2O (L = triethylenetetramine (tta), x = 0; L = tris(2-aminoethyl)amine (taa), x = 2), and [Ni(dien)(H2O)][Ni(CN)4] (dien = diethylenetriamine) have been prepared and studied by elemental analyses, thermal analyses, IR and electronic spectroscopy, and magnetochemical measurements. Although some of the complexes have been characterized by temperature-dependent magnetic susceptibilities in the range 94-296 K the exchange interaction was not found for [Ni(1,2-pn)2][Ni(CN)4] . H2O, [Ni(dien)(H2O)][Ni(CN)4], and [Ni(bpy)2][Ni(CN)4] . 2H2O. The splitting of bands ν (C≡N) in infrared spectra indicates the existence of terminal and bridged cyanide groups. Polymeric structure with cyanide bridges between square-planar Ni(II) (S = 0) and octahedral Ni(II) (S = 1) is proposed.

Full paper in Portable Document Format: 512a95.pdf


Chemical Papers 51 (2) 95–98 (1997)

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