A silyl cation with a three-center si-h-si bond.
The unusually high kinetic stability of the silyl cation 1 is due to the presence of a three-center, two-electron Si-H-Si bond. NMR data ((1) H, (2) H, (13) C, (29) Si) are consistent with the static, symmetrical structure shown, which was further corroborated by the results of density functional calculations.
Institut für Anorganische Chemie der Goethe Universität Frankfurt Marie-Curie-Strasse 11, 60439 Frankfurt am Main, Germany, Fax: (+49) 69-798-29188. Dr.Thomas.Müller@chemie.uni-frankfurt.de.
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NMR spectroscopy; cations; density functional calculations; isotope effects; silicon