Communication
Stabilization of Organosilicenium Ions by means of Intramolecular Coordination of O, S, or P Ligands
First published: 08 July 1999
Citations: 36
Abstract
For the intramolecular stabilization of silicenium ions (R3Si+), O, S, and P donors as well as the known nitrogen-containing systems (as in 1 a) are suitable. The silyl cations in 1 a–d show a trigonal-bipyramidal structure; dynamic processes can be proved by NMR spectroscopy for 1 c, d. Calculations on model compounds document substantial differences in the bonding relationships and support the structural findings. Furthermore, preliminary experiments with 1 b–d indicate significant differences in reactivity.
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