19F N.M.R. SPECTRA OF HEPTAVALENT FLUORIDES AND OXIDE PENTAFLUORIDES
- 1 November 1964
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 42 (11), 2531-2540
- https://doi.org/10.1139/v64-371
Abstract
The 19F n.m.r. spectra of IF7, ReF7, IOF5, ReOF5, and OsOF5 have been recorded. IF7gives rise to a broad symmetric doublet with a splitting of 4 100 ± 300 c.p.s. interpreted as partially collapsed and unresolved 19F—127I coupling. ReF7 gives a single line of width 60 c.p.s. at low field. These spectra give no information about the molecular structure other than that there is a fast intramolecular process causing magnetic equivalence. IOF5 and ReOF5 both exhibit a quintet/doublet spectrum indicative of locked C4v symmetry. The multiplet splittings in IOF5 are not resolved in pure IOF5 or in IOF5/IF7 mixtures, but can be seen for IOF5 in solution in IF5. The doublet lies to higher field than the quintet in IOF5, but the reverse occurs in ReOF5. In the paramagnetic molecule OsOF5 only the resonance of the unique axial fluorine is observed, indicative of localization of the non-bonding d-electron in the equitorial plane of the molecule.Keywords
This publication has 15 references indexed in Scilit:
- Correlation of Nuclear Spin—Spin Coupling Constants with Atomic Number. VI. Exceptions to the RuleThe Journal of Chemical Physics, 1964
- Absolute Correlations of Nuclear Spin—Spin Coupling Constants with Atomic Number. IV. JX—F in Molecules and Ions XF6. A Parallelogram RuleThe Journal of Chemical Physics, 1964
- Xenon Tetroxide: Preparation and Some PropertiesScience, 1964
- Intramolecular Ligand Exchange in Seven-Coordinate StructuresJournal of the American Chemical Society, 1964
- NUCLEAR SPIN–SPIN COUPLING CONSTANTS INVOLVING THE GROUP IV ELEMENTSCanadian Journal of Chemistry, 1963
- Nature of Niobium(V) Fluoride Species in SolutionJournal of the American Chemical Society, 1963
- Conventional Electron Pair Description of Xenon CompoundsJournal of the American Chemical Society, 1962
- The vapour-pressures and other properties of ReF6 and ReF7Journal of Inorganic and Nuclear Chemistry, 1961
- Nuclear Quadrupole Coupling in the Alkali Chloroiodides. I. Chlorine ResonancesThe Journal of Chemical Physics, 1957
- Structure of ClF3 and Exchange Studies on Some Halogen Fluorides by Nuclear Magnetic Resonance1Journal of the American Chemical Society, 1957