An x-ray and nuclear magnetic resonance study of structure and ion motions in (C(NH2 )3 )3 AlF6
Authors:
- M. Grottel,
- Asja Kozak,
- H. Maluszyriska,
- Zdzisław Pająk
Abstract
Guanidinium hexafluoroaluminate (C(NH2)3) 3AlF6 crystallizes in a cubic system in the space group P21/a3,a=13.953(2) AA, Z=8. The guanidinium cation does not exhibit any symmetry; the hexafluoroaluminate anion has 3 symmetry and occupies two inequivalent (4a) and (4b) positions. The ions are connected by relatively strong N-H...F hydrogen bonds. Proton and fluorine spin-lattice relaxation times as well as second moments have been measured over a wide range of temperatures. The analysis of all cross-relaxation effects for the system of four unlike spins has been performed. Activation parameters for the C3 reorientation of the cation and for the NH2 group motion have been derived. Unlike in other guanidinium salts, anion reorientation is hindered by a much higher energy barrier than cation reorientation.
- Record ID
- UAMe67528b7002640f489c90424fe24696b
- Author
- Journal series
- Journal of Physics-Condensed Matter, ISSN 0953-8984, [1361-648X]
- Issue year
- 1992
- Vol
- 4
- Pages
- 1837-1848
- ASJC Classification
- ;
- DOI
- DOI:10.1088/0953-8984/4/7/022 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 0
- Score source
- journalList
- Publication indicators
- = 23; : 1999 = 1.127; : 2006 (2 years) = 2.038 - 2007 (5 years) =2.172
- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAMe67528b7002640f489c90424fe24696b/
- URN
urn:amu-prod:UAMe67528b7002640f489c90424fe24696b
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.