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Adduct Formation of Tantalum(V)‐ and Niobium(V) Fluoride with Neutral Group 15 Donor Ligands, an Example for Ligand Induced Self‐Ionization
Author(s) -
Haiges Ralf,
Deokar Piyush,
Christe Karl O.
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400141
Subject(s) - chemistry , isostructural , adduct , tantalum , pyridine , ligand (biochemistry) , octahedron , niobium , medicinal chemistry , acetonitrile , crystallography , crystal structure , stereochemistry , organic chemistry , biochemistry , receptor
The complexes [ M F 4 (py) 4 ][ M F 6 ], [ M F 4 (2, 2′‐bipy) 2 ][ M F 6 ] and [ M F 4 (dppe) 2 ][ M F 6 ] · ½CH 3 CN ( 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 solution. 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 compounds [NbF 4 (py) 4 ][NbF 6 ] and [TaF 4 (py) 4 ][TaF 6 ], as well as [NbF 4 (dppe) 2 ][NbF 6 ] · ½CH 3 CN and [TaF 4 (dppe) 2 ][TaF 6 ] · ½CH 3 CN were found to be isostructural and to consist of isolated, distorted square‐antiprismatic cations [ M F 4 D 4 ] + ( D = donor atom) and octahedral [ M F 6 ] – anions. In all cases, the donor ligands induce self‐ionization of these pentafluorides.