Nonanuclear Ni(ii) complexes in a [1-7-1] formation derived from asymmetric multidentate ligands: magnetic and electrochemical properties

Abstract

Nonanuclear Ni(II) complexes, [Ni₉(Ln)₆(OH)₆(H₂O)₆] (Ni₉Ln, n = 1–4; H₂Ln = 6-acetoacetyl-2-pyridinecarboxylic acid derivatives), were prepared via self-assembly using the asymmetric multidentate ligands H₂Ln. A corner-sharing tetrahedron-type structure, [Ni₇(μ₃-OH)₆]⁸⁺, and terminal mononuclear units constitute the nonanuclear structure in a [1-7-1] formation. The electrochemical and magnetic properties of Ni₉Ln were modulated by the introduction of various substituents in H₂Ln.