Conformational studies by dynamic NMR. 71. Stereodynamics of triisopropyl(aryl) silanes in solution and in the solid state

Authors
Anderson, JE Casarini, D Lunazzi, L Mazzanti, A
Citation
Je. Anderson et al., Conformational studies by dynamic NMR. 71. Stereodynamics of triisopropyl(aryl) silanes in solution and in the solid state, J ORG CHEM, 65(6), 2000, pp. 1729-1737
Citations number
22
Categorie Soggetti
Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
JOURNAL OF ORGANIC CHEMISTRY
ISSN journal
00223263 → ACNP
Volume
65
Issue
6
Year of publication
2000
Pages
1729 - 1737
Database
ISI
SICI code
0022-3263(20000324)65:6<1729:CSBDN7>2.0.ZU;2-H
Abstract
A study has been carried out of the conformations of triisopropyl(aryl)sila nes (i-Pr)(3)SiAr, (Ar = phenyl, 1-naphthyl, and 2-naphthyl) both as to the orientation of the three isopropyl groups and the conformation about the s ilicon-aromatic bonds. The report comprises dynamic NMR studies of conforma tional interconversions in solution and in the solid state as well as molec ular mechanics calculations. The barriers for the stereomutation processes measured in the crystalline state were found significantly higher than thos e in solution.