Date Published: July 01, 2011
Publisher: International Union of Crystallography
Author(s): Robert T. Stibrany, Joseph A. Potenza.
The title compound, [Co(C10H10BF6N4)(C15H13BF9N6)], is a polymorph of the previously reported neutral cobalt(II) complex [Stibrany & Potenza (2010 ▶). Acta Cryst. E66, m506–m507], which contains one each of the monoanionic ligands, bis[5-methyl-3-(trifluoromethyl)pyrazol-1-yl]borate (Bp) and tris[5-methyl-3-(trifluoromethyl)pyrazol-1-yl]borate (Tp). A distorted octahedral coordination geometry of the CoII atom results from ligation of an H atom, which is part of an agostic B—H⋯Co interaction [H⋯Co = 2.12 (3) Å], and by five imine N atoms, two from a Bp ligand and three from a Tp ligand. Weak intra- and intermolecular C—F⋯π interactions with F⋯centroid distances ranging from 3.025 (4) to 3.605 (4) Å are observed.
For our study of nitrogen-containing heterocyles and their complexes with metal ions, see: Stibrany & Potenza (2006 ▶, 2009a ▶,b ▶); Stibrany et al. (1999 ▶, 2005 ▶, 2006 ▶). For a polymorph of the title compound, see: Stibrany & Potenza (2010 ▶). For oxidation studies of copper and cobalt complexes utilizing the title ligand, see: Gorun et al. (2000 ▶). For agostic interactions, see: Ruman et al. (2001 ▶, 2002 ▶); Siemer et al. (2001 ▶); Ghosh et al. (1998 ▶).