A novel bis-beta-diketonate ligand stabilizes a [Co(II)(8)] cage that encapsulates a (mu(3)-O) ... H ... (mu(3)-O) moiety

作者：Salinas Uber Jorge; Barrios Leoni A; Roubeau Olivier; Aromi Guillem^*

来源：Polyhedron, 2013, 54: 8-12.

DOI：10.1016/j.poly.2013.02.014

• Magnetism
• Bis-beta-diketones
• Coordination chemistry
• Cobalt

The novel ligand 1,3-bis-(3-oxo-3-(2-hydroxyphenyl)-propionyl)-2-pyridine, H4L, is used here for the first time. In a reaction with Co(II) it produces the complex salt [Co8O(OH)(H2L)(6)]HO3 (1), containing an octametallic cluster cation. The topology of this cluster, which encapsulates a rare (mu(3)-O)...H...(mu(3)-O) at its interior, exhibits a remarkable similarity to the cofactor of nitrogenase FeMoco. It features intramolecular antiferromagnetic interactions, which can be simulated using a spin-only model, yielding an S = 0 spin ground state, lying very close to numerous excited states.

• 出版日期2013-4-30