THORIUM(IV) POLY(PYRAZOL-1-YL)BORATE COMPLEXES

The complexes [ThXn (HBPz3)4 - n] (Pz = C3H3N2, pyrazolyl; when n = 2, X = Cl or Br and when n = 1, X = Cl), [ThCl2(HB(3,5Me2Pz)3)2], [ThBr2(BPz4)2], [ThCl3(HBPz3)(dma)(thf)], [Th(HBPz3)4Lx] (when x = 1, L = thf and when x = 2, L = dma) and K[Th(H2BPz2)5] have been prepared. The IR and 1H NMR spectra of the complexes are reported; the latter indicate that in the complexes [ThX2(HBPz3)2] (X = Cl, Br) the HBPz3 group is tridentate, whereas in [ThBr2(BPz4)2] an ionic structure of the type [(Pz2BPz2)2 Th(μPz2BPz2)Th(Pz2BPz2)2]3+[ThBr6(Pz2BPz2)]3- is suggested. © 1978.