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Using 69/71Ga solid-state NMR and 127I NQR as probes to elucidate the composition of “GaI”
- Source :
-
Polyhedron . Mar2012, Vol. 35 Issue 1, p96-100. 5p. - Publication Year :
- 2012
-
Abstract
- Abstract: While the synthetic utility and reactivity of the so-called “GaI” species is reasonably well established, its exact composition remains unknown. Using primarily multinuclear magnetic resonance techniques (and supported with powder X-ray diffraction measurements), we offer some new insights into the composition of “GaI”. Using 127I nuclear quadrupole resonance (NQR) experiments, it is clearly demonstrated that gallium diiodide (GaI2) is a significant component of this material, while GaI3 is not. This finding is in contrast with a prior literature account, which noted that Ga2I3 (i.e., one equivalent of GaI3 per equivalent of Ga metal) was present in significant amounts. Additional solid-state nuclear magnetic resonance (SSNMR) experiments using the 69/71Ga probe nuclei in multiple magnetic fields clearly establish, via its diagnostic Knight-shifted resonance, the presence of Ga0 metal, which is in agreement with prior literature. Taken together, a composition may be tentatively offered: that “GaI” is, to a large extent, two equivalents of Ga0 metal with two equivalents of GaI2, where the latter is composed of Ga+ and ions. This composition may be represented as [Ga0]2[Ga]+[GaI4]−. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 02775387
- Volume :
- 35
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Polyhedron
- Publication Type :
- Academic Journal
- Accession number :
- 72341850
- Full Text :
- https://doi.org/10.1016/j.poly.2012.01.003