A second monoclinic polymorph of {bis-[5-methyl-3-(trifluoro-meth-yl)pyrazol-1-yl]borato}{tris-[5-methyl-3-(trifluoro-meth-yl)pyrazol-1-yl]borato}cobalt(II): a structure containing a B-H?Co agostic inter-action.

ABSTRACT: The title compound, [Co(C(10)H(10)BF(6)N(4))(C(15)H(13)BF(9)N(6))], 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-(trifluoro-meth-yl)pyrazol-1-yl]borate (Bp) and tris-[5-methyl-3-(trifluoro-meth-yl)pyrazol-1-yl]borate (Tp). A distorted octahedral coordination geometry of the Co(II) atom results from ligation of an H atom, which is part of an agostic B-H?Co inter-action [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 inter-molecular C-F?? inter-actions with F?centroid distances ranging from 3.025?(4) to 3.605?(4)?Å are observed.

SUBMITTER: Stibrany RT 

PROVIDER: S-EPMC3151874 | biostudies-other | 2011 Jul

REPOSITORIES: biostudies-other