Complexes of nickel(ll) with aryloxo and functionalized aryloxo ligands

The hydroxo complex (NBu4)2l{Ni(C6F5),(u-OH)}2] reacts with aromatic alcohols at room temperature in methanol to give the binuclear complexes (NBu4)2 [{Ni(C6F5),(u-OAr)},] (Ar = Ph~ C6H4Me-/?! C6H4NO,-p. C6F,). The upyrazolate-i,t-aryloxo complexes (NBu4),[{Ni(C6F_s),},(n-OAr)(u-pz)] (Ar = C6H4NO2-/J, C6F,) can be prepared by treating (NBu4)n [{Ni(C6Fs)2}2(n-OH)(|.i-pz)] with the corresponding ArOH. Mononuclear nickel(II) complexes of a variety of deprotonatable bidentate N.OH ligands have been prepared by reaction of (NBu4)2[{Ni(C6F_s)2(ji-OH)}2J with 2aminoethanol, 2-hydroxymethylpyridine. 2-hydroxipyridine. 2-aminophenol and the Schiff-base ligands 2HOC6H4N=CHR (R = Ph. C6H4Me/;. C6H4MeO-/7 and C6H4Cl-/7). Analytical (C. H. N). conductance and spectroscopic (IR.'H and 19F NMR) data have been used for structural assignments. A single crystal X-ray diffraction study of (NBu4)2 |{Ni(C6F5)2(!_(-OC6F5)}2] showed that coordination about nickel was squareplanar with slight distortion towards a tetrahedral arrangement. The pentafluorophenyl rings are oriented nearly perpendicular to the coordination plane. © Springer-Verlag Ibérica 1997.