Abstract
AbstractThe salt (ClC{PPh3}2)Cl (1), formally seen as an addition compound between the carbone C(PPh3)2 and Cl+, reacts with AlBr3 in DCM or 1‐Br‐2‐F‐C6H4 to give the dication (HClC{PPh3}2)2+ with the counterions [AlCl4]– and [AlBr4]–, respectively. If the reaction was carried out in MeNO2 as the solvent the salt (H2C{PPh3}2)Br[AlBr4] was isolated. The dication (HClC{PPh3}2)2+ was also formed from the reaction of 1 with Me3SiOSO2CF3. The protons at the ylidic carbon atoms stem from the solvents. Alternatively, the dication (HClC{PPh3}2)2+ could be obtained more easily upon reacting 1 with HCl in diethyl ether. The compounds were characterized by multi NMR spectroscopy and by X‐ray analyses.
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