title: Crystal structure of a dinuclear Co(II) complex with bridging fluoride ligands: di-μ-fluorido-bis-{tris-[(6-methyl-pyridin-2-yl)meth-yl]amine}-dicobalt(II) bis-(tetra-fluorido-borate).
abstract: Reaction of Co(BF4)2·6H2O with tris-[(6-methyl-pyridin-2-yl)meth-yl]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 octa-hedral 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 intra-molecular C-H⋯F hydrogen bond is also observed.
authors.affiliation: Department of Science, Kinki University, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Japan.
authors.forename: Masataka
authors.initials: M
authors.lastname: Inomata
authors.affiliation: Department of Science, Kinki University, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Japan.
authors.forename: Yusaku
authors.initials: Y
authors.lastname: Suenaga
keywords: C—H⋯F hydrogen bonds; crystal structure; dinuclear cobalt complex; fluoride bridge; high-spin CoII complex; tripodal ligand