Cyano-bridged tetracyanonickelates, [Ni(CN)4]2-, are suitable model compounds for structural
and magnetic studies of such systems at low temperatures, because the tetracyanonickelate anion may bridge paramagnetic ions partially coordinated with amine ligands and thus to form molecular, 1D, 2D and 3D structures.
The cyano-bridged complexes [Cu(L)]2[Ni(CN)4](ClO4)2 (1) and [Ni(L)][Ni(CN)4] (2) (L=1,4-bis(3-aminopropyl) piperazine) have been obtained by the reaction of the mixture of Cu(L)(ClO4)2 and K2[Ni(CN)4] in water. The [M(L)]2+ and [Ni(CN)4]2- fragments linked by two cyanide ligands of the bridged [Ni(CN)4]2- anion and giving M–(NC)–Ni–(CN)–M linkage. In this presentation, the preparation and X-ray structure of obtained complexes will be discussed in detail.