Crystal structure of a dinuclear CoII complex with bridging fluoride ligands: di-μ-fluorido-bis­{tris­(6-methyl­pyridin-2-yl)meth­ylamine}­dicobalt(II) bis­(tetra­fluorido­borate)

摘要

Reaction of Co(BF4)2·6H2O with tris­[(6-methyl­pyridin-2-yl)meth­yl]amiine in methanol results in a fluoride abstraction from BF4 ⁻, yielding the unexpected title compound, [Co2F2(C21H24N4)2](BF4)2. The complex cation consists of two inversion-related [Co(C21H24N4)]²⁺ moieties bridged by a pair of fluoride ligands. The Co^II cation is six-coordinated in a distorted octa­hedral geometry and forms a +II high-spin state. In the crystal, the complex cation and the BF4 ⁻ anion are connected by C—H⋯F hydrogen bonds, forming a three-dimensional network. An intra­molecular C—H⋯F hydrogen bond is also observed.