Ralf Haiges - Adduct Formation of Tantalum(V)- and Niobium(V) Fluoride with Neutral Group 15 Donor Ligands, an Example for Ligand Induced Self-Ionization.

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      Publication Details (including relevant citation   information): Haiges, Ralf, Deokar, Piyush, Christe,   Karl O., Z. Anorg. Allg. Chem., 2014,   pp Ahead of Print

      Abstract: The complexes [MF4(py)4][MF6], [MF4(2,   2'-bipy)2][MF6] and [MF4(dppe)2][MF6]·1/2CH3CN (M = Nb, Ta) were   obtained from niobium and tantalum pentafluoride by reaction with   the donor ligands pyridine (py), 2, 2'-bipyridine (2, 2'-bipy),   and bis(diphenylphosphanyl)ethane (dppe) in acetonitrile soln.   The complexes were characterized by their vibrational spectra   and, in case of the pyridine and dppe adducts, by their crystal   structure. The pairs of corresponding niobium and tantalum   compds. [NbF4(py)4][NbF6] and [TaF4(py)4][TaF6], as well as   [NbF4(dppe)2][NbF6]·1/2CH3CN and [TaF4(dppe)2][TaF6]·1/2CH3CN   were found to be isostructural and to consist of isolated,   distorted square-antiprismatic cations [MF4D4]+ (D = donor atom)   and octahedral [MF6]- anions. In all cases, the donor ligands   induce self-ionization of these pentafluorides. [on SciFinder(R)]

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