Pentacoordinate silyl cations stabilized by coordination with oxygen donors: Crystal structure, charge distribution, and stereodynamics

Authors
Kalikhman, I Krivonos, S Lameyer, L Stalke, D Kost, D
Citation
I. Kalikhman et al., Pentacoordinate silyl cations stabilized by coordination with oxygen donors: Crystal structure, charge distribution, and stereodynamics, ORGANOMETAL, 20(6), 2001, pp. 1053-1055
Citations number
32
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANOMETALLICS
ISSN journal
02767333 → ACNP
Volume
20
Issue
6
Year of publication
2001
Pages
1053 - 1055
Database
ISI
SICI code
0276-7333(20010319)20:6<1053:PSCSBC>2.0.ZU;2-O
Abstract
Attempted preparation of neutral hezacoordinate silicon chelates with two O --> Si dative bonds (4), in analogy to previously reported bis-N --> Si is omers (2), resulted in unexpected formation, of pentacoordinate siliconium complexes (5 and 6), characterized by a crystal structure. The barrier for inversion of configuration at silicon was determined by selective inversion recovery NMR measurements: DeltaG* = 20.5 +/- 0.2 kcal mol(-1).