Date Published: May 01, 2010
Publisher: International Union of Crystallography
Author(s): Robert T. Stibrany, Joseph A. Potenza.
The title compound, [Co(C10H10BF6N4)(C15H13BF9N6)], is a neutral CoII complex which contains one each of the anionic ligands, bis(3-trifluoromethyl-5-methylpyrazol-1-yl)borate (Bp) and tris(3-trifluoromethyl-5-methylpyrazol-1-yl)borate (Tp). A distorted octahedral coordination geometry results from ligation of an H atom, which is part of an agostic B—H⋯Co interaction (H⋯Co = 2.17 Å), and by five imine N atoms, two from a Bp ligand and three from a Tp ligand. In the crystal, molecules form layers parallel to the (10) planes, and the layers are linked along the a axis by C—H⋯F hydrogen bonds. An intramolecular C—H⋯F interaction also occurs.
For our study of nitrogen-containing heterocyles, such as expanded-ring imidazoles, and their complexes with metal ions, see: Stibrany & Potenza (2009a ▶). For metal complexes with pyrazole, see: Stibrany & Potenza (2006 ▶, 2009b ▶); Stibrany et al. (1999 ▶, 2005 ▶, 2006 ▶). Copper and cobalt complexes utlizing the title ligand have been prepared for oxidation studies, see: Gorun et al. (2000 ▶). For agostic interactions, see: Ruman et al. (2001 ▶, 2002 ▶); Siemer et al. (2001 ▶); Ghosh et al. (1998 ▶).