Intramolecular Base Stabilization of Silicenium Ions: A New Route to Siliconium Ions

Abstract

The silicon atom is pentacoordinate in cations of salts like 1, which can be prepared, for instance, in a redox reaction of the corresponding silane (with I2, X = I) or transformation with electrophiles like PhCoCl (X = Cl) or Ph3C+BF (X= BF4). These compounds were completely characterized; conductivity titrations confirm that they are ionic.