Niobium-93 nuclear quadrupole resonance studies of niobium pentafluoride and its complexes with xenon difluoride and some organic bases

Abstract

⁹³ Nb N.q.r. spectra of NbF₅, XeF₂, NbF₅, XeF₂, 2NbF₅, NbF₅, L (L = Me₂O or CH₂ClCN), and NbF₅,2py have been obtained. The results are consistent with low values of the asymmetry parameter (η) for the electric field gradient tensor at the ⁹³Nb nuclei in all compounds investigated. A simple point-charge model is used to derive a semiquantitative measure of the interaction between XeF⁺ and NbF₆^– or Nb₂F₁₁^– ions in xenon difluoride–niobium pentafluoride complexes.