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Stabilization of Organosilicenium Ions by means of Intramolecular Coordination of O, S, or P Ligands
Author(s) -
Berlekamp UweH.,
Jutzi Peter,
Mix Andreas,
Neumann Beate,
Stammler HansGeorg,
Schoeller Wolfgang W.
Publication year - 1999
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19990712)38:13/14<2048::aid-anie2048>3.0.co;2-c
Subject(s) - intramolecular force , trigonal bipyramidal molecular geometry , reactivity (psychology) , chemistry , silylation , ion , nuclear magnetic resonance spectroscopy , crystallography , spectroscopy , stereochemistry , crystal structure , catalysis , organic chemistry , physics , medicine , alternative medicine , pathology , quantum mechanics
For the intramolecular stabilization of silicenium ions (R 3 Si + ), 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.