title: {2,6-Bis[(2,6-diisopropyl-phosphan-yl)-oxy]-4-fluoro-phenyl-κ(3)P,C(1),P'}(1H-pyrazole-κN(2))nickel(II) hexa-fluoro-phosphate.
abstract: The title compound, [Ni(C(18)H(30)FO(2)P(2))(C(3)H(4)N(2))]PF(6), was prepared by halide abstraction with TlPF(6) in the presence of CH(3)CN in CDCl(3) from the respective neutral pincer chlorido analogue followed by addition of pyrazole. The PO-C-OP pincer ligand acts in typical trans-P(2) tridentate fashion to generate a distorted square-planar nickel structure. The Ni-N(pyrazole) distance is 1.925 (2) Å and the plane of the pyrazole ligand is rotated 56.2 (1)° relative to the approximate square plane surrounding the Ni(II) center in which the pyrazole is bound to the Ni(II) atom through its sp(2)-hybridized N atom. This Ni-N distance is similar to bond lengths in the other reported Ni(II) pincer-ligand square-planar pyrazole complex structures; however, its dihedral angle is significantly larger than any of those for the latter set of pyrazole complexes.
authors.affiliation: Department of Chemistry, John Carroll University, University Heights, OH 44118,  USA.
authors.forename: Man-Lung
authors.initials: ML
authors.lastname: Kwan
authors.forename: Sara J
authors.initials: SJ
authors.lastname: Conry
authors.forename: Charles S
authors.initials: CS
authors.lastname: Carfagna
authors.forename: Loren P
authors.initials: LP
authors.lastname: Press
authors.forename: Oleg V
authors.initials: OV
authors.lastname: Ozerov
authors.forename: Norris W
authors.initials: NW
authors.lastname: Hoffman
authors.forename: Richard E
authors.initials: RE
authors.lastname: Sykora