A novel octanuclear nickel(II)-molybdenum(VI) heterometallic cluster based on the salicylhydroxamate ligand

作者：Dou, Ming-Yu; Lu, Jing^*

来源：Acta Crystallographica Section C-Structural Chemistry, 2016, 72(2): 161-+.

DOI：10.1107/S2053229616000243

• Salicylhydroxamic acid
• octanuclear cluster
• 3d-4d cluster
• nickel(II)
• molybdenum(VI)
• heterometallic cluster
• magnetic properties
• antiferromagnetic interactions
• crystal structure

Salicylhydroxamic acid (H(3)shi) is known for its strong coordination ability and multiple coordination modes, and can easily coordinate to metal cations to form compounds with five-or six-membered rings, as well as mono-, di- and multinuclear compounds with interesting structures having potential applications in organic chemistry, coordination chemistry, and the materials and biological sciences. A novel octanuclear nickel(II)-molybdenum(VI) heterometallic cluster based on the salicylhydroxamate ligand, namely di-(mu)3-acetatodi-mu(2)-acetato-di-mu(3)-hydroxido-di-mu(3)-oxido-tetraoxidooctakis(pyridine-kappa N)bis(mu(5)-salicylhydroxamato)hexanickel(II)dimolybdenum(VI) monohydrate, [Mo2Ni6(C7H4NO3)(2)(C2H3O2)(4)O-5(OH)(2)(C5H5N)(8)]center dot H2O, (I), was synthesized by the reaction of sodium molybdate, nickel acetate and salicylhydroxamic acid in a dimethylformamide/pyridine/methanol solution at room temperature. The salicylhydroxamate(3-) (shi(3-)), acetate and oxide ligands adopt complicated coordination modes and link six Ni-II and two Mo-VI cations into the octanuclear heterometallic cluster. All of the metal cations exhibit octahedral coordination geometries and are connected to each other through the sharing of corners, edges or planes. The heterometallic clusters are further connected to form two-dimensional supramolecular layers through weak C-H center dot center dot center dot O hydrogen bonds. Studies of the magnetic properties of the title compound reveal anti-ferromagnetic interactions between the Ni-II cations.

• 出版日期2016-2
• 单位聊城大学