Synthesis, Structures, and Magnetism of Four One-Dimensional Complexes Using [Ni(CN)4]2- and Macrocyclic Metal Complexes

Four one-dimensional complexes, denoted as [NiL1][Ni(CN)(4)] (1), [CuL1][Ni(CN)(4)] (2), [NiL2][Ni(CN)(4)]center dot 2H(2)O (3), and [CuL2][Ni(CN)(4)]center dot 2H(2)O (4) (L-1 = 1,8-dimethyl-1,3,6,8,10,13-hexaaza-cyclotetradecane; L-2 = 1,8-dipropyl-1,3,6,8,10,13-hexaazacyclotetradecane) were synthesized by reacting nickel/copper macrocyclic complexes with K-2[Ni(CN)(4)]. Subsequently, the synthesized complexes were characterized using elemental analysis, infrared spectroscopy analysis, thermogravimetric analysis, and X-ray powder diffraction. Single-crystal structure analysis revealed that the Ni(II)/Cu(II) atoms were coordinated by two nitrogen atoms from [Ni(CN)(4)](2-) with four nitrogen atoms from a macrocyclic ligand, forming a six-coordinated octahedral coordination geometry. Nickel/copper macrocyclic complexes were bridged by [Ni(CN)(4)](2-) to construct one-dimensional chain structures in 1-4. The characterization results showed that the four complexes obeyed the Curie-Weiss law with a weak antiferromagnetic exchange coupling.

Automated summary

Four one-dimensional complexes were synthesized by reacting nickel/copper macrocyclic complexes with K2[Ni(CN)(4)] and characterized using various analytical techniques. The structures of the complexes were determined to have a six-coordinated octahedral coordination geometry, with the nickel/copper ions coordinated by [Ni(CN)(4)](2-) and the macrocyclic ligands. The complexes exhibited weak antiferromagnetic exchange coupling, as confirmed by the Curie-Weiss law.