{3-Methyl-2-[(1-oxido-2-naphth-yl)methyl-idene-amino-κO,N]butano-ato-κO}(1H-pyrazole-κN)nickel(II)

{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

The title compound, [Ni(C₁₈H₃₀FO₂P₂)(C₃H₄N₂)]PF₆, was prepared by halide abstraction with TlPF₆ in the presence of CH₃CN in CDCl₃ from the respective neutral pincer chlorido analogue followed by addition of pyrazole. The PO—C—OP pincer ligand acts in typical trans-P₂ 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 sp²-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.