|
|||||
|
|
Dynamic disorder in solid tetrakis(trimethylstannyl)methane, C(SnMe3)4, investigated by one- and two-dimensional variable-temperature119Sn and13C NMR spectroscopy |
|
| Authors: | P. Bernatowicz R. E. Dinnebier X. Helluy J. Kümmerlen A. Sebald |
| Affiliation: | 1. Laboratorium für Anorganische Chemie, Universit?t Bayreuth, Bayreuth, Germany 2. Lehrstuhl für Kristallographie, Universit?t Bayreuth, Bayreuth, Germany 3. Department of Pharmaceutical Sciences, Preformulation/Physical Analysis, Rh?ne-Poulenc Rorer, Research Center of Vitry-Alfortville, Vitry-sur-Seine Cedex, France 4. Bayerisches Geoinstitut, Universit?t Bayreuth, Bayreuth, Germany |
| Abstract: | Modes of molecular reorientation in solid tetrakis(trimethylstannyl)methane, C(SnMe3)4, have been investigated by one- and two-dimensional13C and119Sn static and magic-angle spinning nuclear magnetic resonance spectroscopy (NMR) in the temperature range from 150 to 290 K. Spectral lineshape fitting of one- and two-dimensional119Sn NMR experiments shows the pseudo-fivefold disorder previously observed by single-crystal X-ray diffraction on C(SnMe3)4 to be dynamic disorder (activation energy Ea ? 32 kJmol?1). A dynamic-disorder model where each tin atom in a C(SnMe3)4 molecule occupies the twenty sites of a nearly perfect pentagonal dodecahedron with equal probability agrees best with the experimental solid-state NMR results. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |